If you do long, you are likely to explode when futures plummet.
Generally speaking, short positions will not owe money to futures companies, because there is still some money in the account at this time.
What's really serious is through the warehouse.
Turning over the warehouse means that all the money in your account is gone, and you still owe money to the futures company.
Exploding positions (that is, closing positions) often happens, and few of them go through positions, but there are also). Therefore, speculation in futures is very risky, so we must control the risk. Never operate in Man Cang or Zhongcang, only in small positions!