It was restickered black in the first place because they
couldn't get rid of the stains on the white C151s...
Plus the 151 came unpainted, only treated with glass bead surface
blasting and application of the red strip to save costs.
The specifications of the trains are from Japanese and
procurement of parts also. China CSR Qingdao Sifang only does
assembly and on-site testing. This is partly due to the stretched
factory capacity in Japan. This point Mr sgbuses has already
mentioned and I just add-on.