After checking, the relevant department confirms that Hang Seng Index market opened late by more than an hour on that day due to the liquidity provider. But we checked that the customer didn't hold the related position, which didn't affect his orders.

The Hang Seng Index opened normally on January 2, but the index futures did not move until the situation was reflected, leaving a large gap. Crude oil ran away after hitting the stop loss, leaving a long upper shadow line. It was suspected that the trading information was sold to a third party.