The specific reasons are as follows:

If the night market is set up, it will still be valid the next day, because the night market and the daytime trading hours of the next day are settled together, and the same settlement date is valid. In addition, it depends on whether the setting is a list of cloud conditions. If it is a cloud condition list, it will always be valid.

Of course it works. Pay attention to domestic futures trading at 3 pm. For example, an ordinary order you place every day is valid on the same day. This day refers to the futures settlement from 9: 00 pm the previous day to 3: 00 the next day. This is a complete futures trading day. If there is no variety of midnight snack, of course, you can't trade at night. However, more than 30 varieties of commodity futures have night trading, covering a wide range, including most futures commodities.