1. This contract belongs to the contract whose validity is to be determined due to fraud.

Note: Zhang Feng's legitimate interests were damaged by Li Hong's concealment and fraud, and he bought Li Hong's products without knowing it, but did not touch the bottom line of endangering national interests, so it should be a contract with undetermined validity.

2. Zhang Fenglai makes a contract. If Zhang Feng agrees to continue to perform or both parties reach an agreement through consultation, Zhang Feng can continue to perform. If no agreement can be reached, Zhang Feng can sue to terminate the contract, and Li Hong will refund Zhang Feng's payment.

The second question:

1, Li Ping's behavior should belong to the behavior of concluding a contract through malicious negotiation.

2. Be liable for compensation.

3. Article 42 In the process of concluding a contract, if any of the following circumstances causes losses to the other party, the parties shall be liable for damages:

(1) Concluding a contract under the guise of malicious negotiation;

(2) Deliberately concealing important facts related to the conclusion of a contract or providing false information;

(three) there are other acts that violate the principle of good faith.

I hope you are satisfied with my answer.