Article 14 An offer is an expression of intention to conclude a contract with another person and shall meet the following conditions:
Specific content;
(2) The offeror is bound by the expression of will by indicating that he has accepted the offer.
Article 15 An invitation to offer is an expression of intention to expect others to make an offer to themselves. Sent price list, auction announcement, tender announcement, prospectus, commercial advertisement, etc. It's an invitation to offer. If the content of a commercial advertisement conforms to the provisions of the offer, it shall be regarded as an offer.
Article 16 An offer takes effect when it reaches the offeree. If a contract is concluded in the form of data message, and the addressee designates a specific system to receive the data message, the time when the data message enters the specific system shall be regarded as the arrival time; If the specific system is not specified, the time when the data message first enters any system of the addressee shall be regarded as the arrival time.