The ground is uneven. Can Leshan corundum putty be used for local leveling?

No putty. If you can, you'd better level it with cement. If you can't, you can also use a floor mat. Floor mats are used for composite floors. Spread the treasure on the ground first, and then spread the floor on it. There are two kinds of floor mats, one is soft material, whose main function is moisture-proof and dust-proof, and the other is blow-molded foaming material, with a height ranging from 1-5 cm and a hard texture.