Yellow-streaked warbler 
(Phylloscopus armandii)

The yellow-streaked warbler (Phylloscopus armandii) is a species of leaf warbler in the family Phylloscopidae.
The bird breeds across much of China and migrates south to Yunnan and northern Southeast Asia.

Leaf warblers were formerly included in the Old World warbler family but are now considered to belong to the family Phylloscopidae, introduced in 2006.
The name Phylloscopus combines the Ancient Greek phullon meaning "leaf" and skopos meaning "seeker" (from skopeo, "to watch").