> There were rumors in May 2017 that some airports in China started to reject passports for Chinese citizens per some new internal regulations, so that is proba

> There were rumors in May 2017 that some airports in China started to reject passports for Chinese citizens per some new internal regulations, so that is probably what was initially reported. That explains it, that's about the time my friend was trying to figure out their document situation for a trip back to China. They ended up opting not to fly domestically because of the uncertainty.