From a traveler:

I know you have many readers who are interested in the situation of the Church in China. Could I ask them, through you, to help me? My husband and I will be traveling to China this summer. From what I understand, it’s impossible, as well as dangerous for all concerned, for foreigners to attend mass in the underground Church. Is it licit (and hence required on Sundays or holy days) to attend a Patriotic Catholic Association mass? Perhaps the answer corresponds exactly to whether you consider the PCA schismatic. Could we compromise by attending the PCA mass but not receiving Communion?

The Cardinal Kung Foundation’s open letter to the Vatican from March 2000(http://www.cardinalkungfoundation.org/cpa/openletter2.html#_Toc482165999) seems to argue that foreigners should not attend a PCA mass. The same letter quotes Father Paul Pang, O.F.M., the Director of Office for the Promotion of the Overseas Chinese Apostolate of the Sacred Congregation for the Evangelization of Peoples, as allowing attendance as long as there is no apparent "evil example." What that means is not clear to me.