Can people with Chinese passports and US green cards travel to Xinjiang?

Yes. There are restrictions on foreigners going to Xinjiang. People with Chinese passports and US green cards need to apply for an entry permit before they can travel to Xinjiang. A green card is a permanent residence permit for foreigners. It is a permanent residence permit for foreign citizens. Holding a green card means that the cardholder has permanent residence in the country of issue. Holding a green card can exempt you from an entry visa for a certain period of time.