This would allow the Chinese to keep their guys on the narrow bodies and reduce the massive wages they are paying to expats.
Actually the best terms for expats in China are on the A320, closely followed by the B787. The Airbus is a workhorse and you will be flogged to death but well paid. Worst pay is on the B777 as the local Pilots got promoted onto that fleet from the narrow bodies reducing the demand for foreigners.
There is NO interview for foreigners with Chinese airlines, if you pass the written, medical and checkride then you have a job.