1. In terms of effectiveness:

As a source of international law, this convention is not mandatory for all countries. It is effective only if it joins, and you can also choose to join. The provisions are valid, but some are not followed. Since January 1, 1988, the Convention has entered into force for 11 member states, including my country. As of June 2005, 65 countries have joined the Convention.

Contract law is part of my country’s domestic law and is mandatory throughout the country, and all contractual behaviors are subject to its regulation.

2. From the perspective of the subject:

The Convention applies to contracts for the sale of goods entered into between parties whose places of business are in different countries, but one of the following two conditions must be met: : Either the countries where the parties have their places of business are both contracting states; or although the country where the parties have their places of business is not a contracting state, according to the rules of private international law, the law of a certain contracting state should be applied. 2. Scope of objects to which the Convention applies. The scope of subject matter to which the Convention applies is "sales and sales of goods".

The subjects of contract law are domestic natural persons, legal persons, and other organizations.

3. In terms of the scope of adjustment:

The Convention excludes the following types of sales: (1) sales for the purpose of direct private consumption; (2) auctions; (3) ) Purchases and sales authorized by law enforcement warrants or laws; (4) Purchases and sales of public bonds, stocks, investment securities, negotiable instruments, and currencies; (5) Purchases and sales of ships, hovercrafts, and aircraft; (6) Purchases and sales of electricity; (7) The seller must not Most obligations are the sale and purchase of labor and services.

The Contract Law basically stipulates various domestic sales and purchases, and stipulates fifteen types of well-known contracts, including "contracts for the supply and use of electricity, water, gas, and heat".

4.

The Convention does not cover: the validity of the contract, or the validity of any of its provisions or the validity of customs; the impact of the contract on ownership; the death, injury or damage caused by the goods to persons Product Liability Issues.

Contract law has provisions on these.

5. The Contract Law also has many similarities with the Convention, such as: a contract goes through two stages: offer and acceptance, as well as remedies for breach of contract, etc.