Central Bullion and Zhongrong International is one company which is unscrupulous. The platform closed my position without authorization. US TECH100 open position selling price was 15944.500 and give me closing position price 16056.500. My balance at that time was more than 800 US dollars, and the deposit was sufficient. Unauthorized liquidation cost me $446.40. And the backstage even modified my orders. At 4:00 a.m. on July 20th, two US TECH100 orders opened at the selling price of 0.16 lots at 15956 and 0.16 lots at 15946. At 10:00 a.m., I woke up and saw that my order had changed to 15856 and 15846. And the opening time had changed to 6:32 a.m. and 6:45 a.m. I closed the market at 5:00 a.m., slept until 10:00 a.m. and woke up, and when I found an order problem, I closed all positions.