As parts of newly regrouped Air China, China Southwest Airlines and CNAC Zhejiang Airlines have started to change their original liveries into Air China's. Recently, a Boeing 737-300 (Reg No. B2522) becomes the first China Southwest Airlines' aircraft to get Air China livery. On 14 Jan, the painting project of B2522 was successfully completed in Chengdu. From official source, this aircraft will return to normal operation from 17 Jan this year.
Here is the URL of photo:
Photo from CARNOC