A researcher checks dried plant samples in the Tamanthi Wildlife Sanctuary in north Myanmar, May 27, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last til June 15. (Xinhua/Jin Liwang)

Chinese researchers work on plant samples at their campsite in the Tamanthi Wildlife Sanctuary in north Myanmar, May 27, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last til June 15. (Xinhua/Jin Liwang)

Researchers collect plant samples in the Tamanthi Wildlife Sanctuary in north Myanmar, May 28, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last til June 15. (Xinhua/Jin Liwang)

Aerial photo taken on May 22, 2019 shows a campsite of the China-Myanmar joint field expedition in the Tamanthi Wildlife Sanctuary in north Myanmar. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last til June 15. (Xinhua/Jin Liwang)

Researchers analyze the excrement of elephant to judge its food source in the Tamanthi Wildlife Sanctuary in northern Myanmar, May 24, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last til June 15. (Xinhua/Jin Liwang)

Chinese researchers collect plant samples in the Tamanthi Wildlife Sanctuary in north Myanmar, May 25, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last til June 15. (Xinhua/Jin Liwang)

Chinese researchers check plant samples at their campsite in the Tamanthi Wildlife Sanctuary in north Myanmar, May 27, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

Local chef cooks dinner at the campsite in the Tamanthi Wildlife Sanctuary in north Myanmar, May 24, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

A researcher checks dried plant samples in the Tamanthi Wildlife Sanctuary in north Myanmar, May 27, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

A Chinese researcher cleans himself up in the morning at the campsite in the Tamanthi Wildlife Sanctuary in north Myanmar, May 28, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

A Chinese researcher dries plant samples at the campsite in the Tamanthi Wildlife Sanctuary in north Myanmar, May 30, 2019. A China-Myanmar joint field expedition made up with researchers from the Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in north Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last to June 15. (Xinhua/Jin Liwang)

Chinese researchers check plant samples at their campsite in the Tamanthi Wildlife Sanctuary in north Myanmar, May 30, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

A Chinese researcher checks plant samples at the campsite in the Tamanthi Wildlife Sanctuary in north Myanmar, May 27, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

A Chinese researcher climbs to collect plant samples in the Tamanthi Wildlife Sanctuary in north Myanmar, May 28, 2019. A China-Myanmar joint field expedition made up with researchers from the Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in north Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last to June 15. (Xinhua/Jin Liwang)

Researchers walk on their way to collect plant samples in the Tamanthi Wildlife Sanctuary in north Myanmar, May 28, 2019. A China-Myanmar joint field expedition made up with researchers from the Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in north Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last to June 15. (Xinhua/Jin Liwang)

Chinese researchers collect plant samples in the Tamanthi Wildlife Sanctuary in north Myanmar, May 26, 2019. A China-Myanmar joint field expedition made up with researchers from the Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in north Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last to June 15. (Xinhua/Jin Liwang)

Chinese researchers collect plant samples in the Tamanthi Wildlife Sanctuary in north Myanmar, May 29, 2019. A China-Myanmar joint field expedition made up with researchers from the Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in north Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last to June 15. (Xinhua/Jin Liwang)

A Chinese researcher shows a fish sample in the Tamanthi Wildlife Sanctuary in north Myanmar, May 27, 2019. A China-Myanmar joint field expedition made up with researchers from the Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in north Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last to June 15. (Xinhua/Jin Liwang)

Researchers install infrared camera to monitor animals in the Tamanthi Wildlife Sanctuary in north Myanmar, May 26, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

Researchers commute between their campsites on water in the Tamanthi Wildlife Sanctuary in north Myanmar, May 24, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

A Chinese researcher shows fish samples in the Tamanthi Wildlife Sanctuary in north Myanmar, May 27, 2019. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

Researchers commute between their campsites on water in the Tamanthi Wildlife Sanctuary in north Myanmar, May 30, 2019. A China-Myanmar joint field expedition made up with researchers from the Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in north Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last to June 15. (Xinhua/Jin Liwang)

Aerial photo taken on May 26, 2019 shows a campsite of the China-Myanmar joint field expedition in the Tamanthi Wildlife Sanctuary in north Myanmar. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)

Aerial photo taken on May 26, 2019 shows a view of the Tamanthi Wildlife Sanctuary in north Myanmar. A China-Myanmar joint field expedition, made up with researchers from the Southeast Asia Biodiversity Research Institute of the Chinese Academy of Sciences (CAS-SEABRI) and the Natural Resources and Environmental Conservation of Myanmar, is doing researches on the biodiversity of the Tamanthi Wildlife Sanctuary in northern Myanmar. The expedition, the eighth of its kind since 2014, began on May 14 and will last till June 15. (Xinhua/Jin Liwang)