I will leave the theological aspect of your question to those more familiar with the validity of the ordination of Patriotic Association priests. IIRC the “bishops” of the association are chosen by the government of the PRC and not by the Holy See. This raises the question of apostolic succession and whether these “bishops” actually have the power to ordain and also whether the priests ordained by them are capable of acting in Persona Christi.
There are several reasons that I would recommend against receiving the sacraments. Especially reconciliation. You have to remember that while any confession you make goes from you through the priest to God’s ear, it will more than likely also be cc:'d to the local office of the Ministry of Public Security (a national police force combined with intelligence gathering and para-military operations) and also to the directorate within the Ministry for State Security (MSS) or Guojia Anquan Bu [Guoanbu] that handles the monitoring of foreigners within China.
The loyalty of the Patriotic Association clergy is at the least divided and at the most given first to the state and then to the church. You will automatically be viewed as a spy anyway simply due to the paranoia and perception of all non-Chinese as barbarians and threats to the state. Use as a guide the Miranda warning before you go to confession, "anything you say
can and will be used against you.
On a happier note, if you travel in areas where there are schools attended by foreigners (particularly Americans and Italians) don’t be surprised if you meet a member of the clergy in mufti. I’ve known of a couple of priests who travelled to China as students with no external indication whatsoever of their actual vocation. Just be careful, expect to be the object of much curiosity and some hostility.
If you do make the trip, I wish you well and will keep you in my prayers.
If you’re interested in learning more about the criminal justice system in the PRC, you can find the CIA World Factbook Report
here
For an analysis of religious persecution in China you can go
here
For a report on religous persecution being used against foreigners as well, you can go
here