Just find a regular American futures company with a record in CFTC NFA. There is a list of CFTC·NFA. But you must be good at English. Futures companies with formal CME seats have no Chinese service. In addition, there is no difference between standard 500 and MI500. Standard 500 is a large point value, a large margin. You don't want to think about how big the standard 500 is. In fact, as far as the margin for opening positions is concerned, if you realize the corresponding margin of 300 on the MINI, you can open more positions.