Raspberry Pi 4b has mipi interface?

Yes

Operation in the shutdown state, the board has two rows of sockets, pay attention to the rows of wires inserted into the middle of the position of the rows of sockets, in fact, look carefully there is a mark camera, pay attention to the rows of wires positive and negative don't inserted the opposite.

Then itself, I first tested it on a 64-bit system, and it didn't go too well, so I switched to a 32-bit system.