You are talking about Mainland China airlines.
Of course, these US OTA booking numbers won't work there.
Bookings from Mainland China airlines can be usually accessed by travelsky.
http://www.travelsky.com/tsky/
use google translate, if you cannot read Chinese.
I wanted to add frequent flier numbers and select seats on the flights.
Usually, you can only perform these functions online during OLCI.
Or you call them directly.