Polishing is a delicate job. Generally, jadeite with slightly higher hardness, such as Hetian jade, should use different kinds of oilstones. Grind it a little along the edge. Different types of oilstones from coarse to fine should be evenly ground for many times. The model number is 60-80- 100- 120. Different places sell different numbers. Anyway, from coarse to fine, polishing requires at least three kinds of oilstones. After the oilstone is completely polished, there are basically no knife marks, tool marks and abrasions. Then polish it with cowhide or cotton wheel on the machine. The cowhide is shiny. The cloth wheel casts a soft light. Remember to polish the cowhide and cloth wheel thoroughly with oilstone before polishing. Otherwise, throwing it out is just a flower, which wastes everything and makes rework more troublesome. Patience is the main thing, and polishing is also a skill. A good polisher can get about two thousand yuan a month. Don't underestimate it. Carve in three parts and grind in seven parts. That's the truth.