Zosterops japonica

The warbling white-eye (Zosterops japonicus) is a small passerine of the white-eye family whose native range includes much of East Asia, including the Russian Far East, Japan, Korea and the Philippines. It has been introduced to other parts of the world as a pet and for pest control, and historically was kept as a cage bird in Japan. It was described by Temminck and Schlegel in 1847 from a specimen collected in Japan. The source does not describe its status in China. (Wikipedia, general species account)