Sell 3800 100

When you buy 3879 99, you open 500 lots more than 3800, which is influenced by your initiative to buy the outer disk.

Sell 380 1 200

Buy 400,400 for 3800, and hang 3800. If you want to make a big deal at once, you can make a deal. You can hang the price higher, such as 38 10. Then 3800-38 10 will be closed when there are selling orders from small to large, not at the entrusted price, unless no one sells them in the middle.