Old literary criticism is generally about buying books or something. But after the old batch is approved, you can see a shop selling Chinese painting supplies not far from your right. Everything is complete and cheap, so I always go there to buy it.
There are several independent wholesale shops in the north, one is called "Haotian Art" and the other is called "Sibaozhai".
If you buy a large drawing board, you can sell it in batches. If you want to order something special, you must go to the optical shop. You can go to Yate Gallery and Yidu Gallery at the main entrance of Lu Mei.