So you are arguing that 'unofficial churches' are not a religion? Really?
No - the state does not have the right to decide what is legitimate in religion.
Chinese Constitution:
'Article 36 Citizens of the People’s Republic of China enjoy freedom of religious belief.
No State organ, public organization or individual may compel citizens to believe in, or not to believe in, any religion; nor may they discriminate against citizens who believe in, or do not believe in, any religion.
The State protects normal religious activities. No one may make use of religion to engage in activities that disrupt public order, impair the health of citizens or interfere with the educational system of the State.
Religious bodies and religious affairs are not subject to any foreign domination.'
There is no requirement for religions to be 'official'.
http://www.npc.gov.cn/zgrdw/en...