For a Chinese citizen, a Chinese passport is normally not valid for entering Hong Kong or Macau. A two-way permit with a valid Hong Kong endorsement is used to visit Hong Kong. However, Hong Kong allows Chinese citizens to enter Hong Kong using a Chinese passport for the purpose of transit from a foreign country within 7 days without any endorsement, i.e. you can enter Hong Kong after returning from the U.S. using your Chinese passport only, by stating that you are returning to the mainland.
However, a lot of travellers had trouble on the return journey by using routing like HKG - PEK - foreign country on cheap CA tickets.
On the outbound trip, when entering Hong Kong, the travellers show the air ticket and a valid visa to the foreign country, and takes the flight to the foreign country without any trouble, transiting in PEK. However, on the return trip, they are blocked from boarding without a valid Hong Kong endorsement in their two-way permit.
Does anyone know / have experience on a such trip, i.e. from foreign country, transiting at PEK airside, fly to Hong Kong or Macau, and return to mainland China by land or sea? Can you complete the trip with your Chinese passport only?