Xiamen Air made this announcement on social media on December 1, 2018:

December 1 marked that the Boeing 757 ended his era of being a passenger airplane in China as our last Boeing 757 touched down in Xiamen Airport and completed its final commercial flight. Farewell, the most handsome member of the fleet.

Note: Xiamen Air operated four Boeing 757-200s at the end. B-2868 (msn 32941) had the honor of operating the last revenue flight, flight MF8512 from Shanghai (Hongqiao) to Xiamen.

Above Photo credit: @江畔寻歌 (Weibo)

Top Copyright Photo: This pictured 757 was also retired. Xiamen Air Boeing 757-25C B-2869 (msn 32942) PEK (Michael B. Ing). Image: 944470.

Xiamen Air aircraft slide show: