This livery is a very previous one. CNAC(China Nationwide Aviation Company) is an previous firm that was arrange in 1986 and was shared 45% with PAN AM. After PAN AM closed down, CNAC grew to become a impartial firm. Due to the require of recombination from CAAC in 2002, Air China, China Southwest Airways and CNAC-Zhejiang Airways established Air China Groupe after which, CNAC-Zhejiang Airways renamed Air China Zhejiang Filiale and each plane modified the livery to Air China.(B-2376 is on of them)
Credit:
SkylineGTRFreak, Chang Xu