How do China laws punish superstitious witches?

Look at its specific behavior and actual consequences, at least until it disturbs social order or infringes on the legitimate rights of others:

The lightest administrative penalty:

Article 27 of the Law on Public Security Administration Punishment: Anyone who commits one of the following acts shall be detained for more than 10 days and less than 15 days, and may also be fined less than 1,000 yuan; If the circumstances are relatively minor, they shall be detained for more than five days and less than ten days, and may be fined not more than five hundred yuan:

(1) Organizing, instigating, coercing, tricking or inciting others to engage in cult, cult or superstitious activities, disrupting social order and harming the health of others;

(2) using religion or qigong to disrupt social order and endanger the health of others.

The quickest answer is local regulations. Unless you happen to be from Heilongjiang province, it is of little reference, because many provinces have no special regulations in this regard.

Moreover, the Interim Provisions of Heilongjiang Province on Banning Witch God Activities was promulgated in 1988, and it became invalid in 1998. Instead, it was the Provisions of Heilongjiang Province on Prohibiting Feudal Superstition Activities.