legal ground
Article 143 of the Civil Code
A civil juristic act that meets the following conditions is valid:
(1) The actor has corresponding capacity for civil conduct;
(2) the meaning is true;
(three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.
Article 470
The contents of a contract shall be agreed upon by the parties, and generally include the following clauses:
(1) The name and domicile of the party concerned;
(2) Subject matter;
(3) quantity;
(4) quality;
(5) Price or remuneration;
(6) Time limit, place and method of performance;
(7) Liability for breach of contract;
(8) Methods for resolving disputes.
The parties may conclude a contract by referring to the model texts of various contracts.
Article 490
If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.