Contracting negligence refers to the fact that during the conclusion of the contract, one party's trust interest was damaged due to the breach of its obligations based on the principle of good faith, and the other party should be liable for damages; the other party's trust was established and valid, However, because the contract is not established or invalid, and suffers no interest, such uninterest is a loss of trust interest. According to the above definitions, Party A does not need to bear the liability for negligence in contracting:. ["Both parties A and B negotiate and jointly build a pharmaceutical factory. Party A invests in technology and proposes that Party B needs to train relevant personnel before signing a contract with Party B. After Party B has invested 1 million yuan to train relevant personnel, Party A finds that there are problems with Party B's pharmaceutical technology , Suspension of cooperation with Party B.", 'Party A claimed that there was a batch of high-quality rosewood to be sold to Party B. Party B immediately signed a supply agreement with Rosewood furniture for Party C and paid a security deposit to Party C. As a result, Party B discovered that Party A before signing the contract with Party A Rosewood to be sold is counterfeit.', 'Party A wants to sell his house to Party B for 500,000 yuan, and requires Party B to buy it in cash within 10 days. To raise money for the house, Party B sells the newly purchased car at a very low price, on the 9th day When buying a house, Party A has sold the house to Party C and has completed the transfer formalities.', "Party A retaliated against Party B, claiming that it wanted to purchase a batch of fruits of Party B at a high price. Party B originally intended to sell the fruit to Party C, and then suspended the negotiation with Party C. As a result, Party A repented before signing the contract, causing Party B's fruit Rotate without selling in time."]