Common Reed Bunting

The common reed bunting is a medium-sized bunting, 13.5–15.5 cm long and 10–28 g, with a small but powerful seed-eating bill, breeding throughout Europe and much of the Palearctic. Most individuals migrate south in winter, though those in the milder south and west are resident. It is a common sight in reedbeds but also breeds in drier open areas such as moorland and arable land. (Wikipedia, general species account)

The male has a black head and throat, a white neck collar and underparts and a heavily barred brown back; the female is much duller, with a streaked brown head. Breeding usually runs from early April to late August, with four to five olive-grey eggs marked with the hair-like lines characteristic of buntings. The male's song is a repetitive srip. The source does not describe its status in China. (Wikipedia, general species account)