It was reported as far back as 2017 that Huobi were using clients' deposit without their knowledge or consent and therefore running a fractional reserve system. I've been warning people on this forum about this for literally years:
Huobi, the same exchange which were found to be running a fractional reserve system?
Huobi and OKCoin have both been caught using users' deposits to invest in various high risk vehicles, meaning that they were no longer holding all the coins required to recover all their deposits, and were therefore fractional reserve
Huobi admitted to being fractional reserve and using customers' money to hand out risky loans and investments for their own profit at their users' risk
The writing has been on the wall for years. Anyone who still had coins on Huobi is just asking to lose them all.
Overall, i think we should not panic and do not recommend others to withdraw there funds until they make some announcements because such panic and quick withdrawals will left that exchange no other choice but bankrupt only.
This is bad advice. The only way that withdrawals lead to bankruptcy is if they are fractional reserve. If they store every deposit in a secure cold wallet like they should, then they will have more than enough coins to process each and every withdraw. Everyone should withdraw all their coins
now (or ideally, years ago).