Do I need to sign a contract for the order of audio-visual books?

In any case, it's better to sign a contract for more money. As long as it is original, we should be careful not to break the contract.

A contract is an agreement between civil subjects to establish, change and terminate a civil legal relationship.

Article 464 of the Civil Code of People's Republic of China (PRC): The legal provisions on identity relations apply to marriage, adoption and guardianship agreements; If there are no provisions, the provisions of Part III can be applied by reference according to its nature.

Contracts established according to law are protected by law. A legally established contract is legally binding only on the parties, except as otherwise provided by law.

Contract is an objective requirement to adapt to the private ownership of commodity economy and a legal form of commodity exchange. After commodity production, people have gradually formed many habits and rituals about exchange in the long-term exchange practice for the sake of safety and credibility. These habits and rituals of commodity exchange have gradually become the general rules for adjusting commodity exchange. With the establishment of private ownership and the emergence of the state, in order to maintain private ownership and normal economic order, the ruling class stipulated the habits and rules conducive to its commodity exchange in legal form, and ensured its implementation with the coercive power of the state. So the commodity exchange contract law came into being. In ancient Rome, people paid attention to contracts. Signing a contract must go through the prescribed channels before it has legal effect. If any details of the terms and actions of the contract ceremony are omitted, the whole contract will be invalid. With the development of commodity economy, this complex form directly affects the development of commodity exchange. In theory and practice, Roman law gradually overcame formalism in contracting. The appearance of material contract and consensual contract indicates that Roman law has changed from attaching importance to form to attaching importance to the will of the parties to the contract, thus liberating commodity exchange from complex forms and becoming the historical source of modern concept of freedom of contract.