Every time you log in to the market software, a page will pop up. Varieties and contracts with daily limit or margin adjustment will be displayed. In general, the price limit is fixed. There are two main reasons why the price limit will change: First, the current market fluctuation is relatively large. In order to alleviate this market pressure, the price limit will be expanded. The other is near the delivery month, and it is possible to adjust the price limit. If you are in Beijing, you can add me QQ.