The reasons for the collapse of Tongdelai Hotpot may be as follows:

1. Poor management: Tongdelai Hotpot’s performance has been poor, which may lead to the deterioration of the company’s financial condition , cash flow shortage makes it difficult to maintain normal operations.

2. Fierce competition: The market competition in the hot pot industry is fierce, and Tongdelai Hot Pot faces strong competitive pressure from other hot pot brands. If Tongdelai hotpot does not have unique dishes or service advantages, it will be difficult to gain a foothold in the market.

3. Hygiene issues: In recent years, Tongdelai Hot Pot has been exposed to some hygiene issues, such as stale ingredients and poor sanitary conditions. These problems may seriously affect consumers' reputation and lead to the loss of customers.

4. Business license issue: According to regulations, hot pot restaurants need to publish their raw meat products business license in a conspicuous place. If Tongdelai Hotpot does not have this license or there is a problem with the license, it may be punished and unable to operate normally.

In general, these factors may have jointly led to the collapse of Tongdelai Hotpot. However, the specific situation may need to be further confirmed based on official public information.