Is it illegal to criticize the four pillars? Is it legal to learn the Book of Changes and want to be a facade?

At present, this area belongs to a gray area, which is neither legal nor illegal, depending on the control of the local government. The four pillars belong to fortune telling, but they belong to a traditional culture. From this perspective, four pillars are not illegal. Fortune-telling is a superstitious activity in any case, and it is within control.

Nobody cares about this now, as long as you are good. To prepare for the worst is just to order it to close down, but remember, learn the real skills and don't engage in crooked ways. What is a crooked door? I don't know the eight characters, I ching, and cheat money under the guise of fortune telling. That kind of characterization is hard to say.