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)