Ar cle 139 An expression of intent made through public no ce becomes e ec ve upon the me the public no ce is posted. Ar cle 140 A person performing a civil juris c act may make an expression of intent either expressly or implicitly. Silence is deemed as an expression of intent only when it is so provided by law, agreed by the par es, or accords with the course of dealing between the par es. Ar cle 141 A person performing a civil juris c act may withdraw an expression of intent. The no ce of withdrawal of the expression of intent shall reach the counterparty prior to or at the same me with the counterparty’s receipt of the expression of intent. Ar cle 142 Where an expression of intent is made to another person, the meaning of the expression shall be interpreted according to the words and sentences used, with reference to the relevant terms, the nature and purpose of the civil juris c act, the custom, and the principle of good faith. Where an expression of intent is not made to any speci c person, the true intent of the person performing a civil juris c act shall not be interpreted solely on the words and sentences used, but along with the relevant terms, the nature and purpose of the civil juris c act, custom, and the principle of good faith. Sec on 3 E ect of a Civil Juris c Act Ar cle 143 A civil juris c act is valid if the following condi ons are sa s ed: (1) the person performing the act has the required capacity for performing civil juris c acts; (2) the intent expressed by the person is true; and (3) the act does not violate any mandatory provisions of laws or administra ve regula ons, nor o end public order or good morals. Ar cle 144 A civil juris c act performed by a person who has no capacity for performing civil juris c acts is void. Ar cle 145 A civil juris c act, performed by a person with limited capacity for performing civil juris c acts that is purely bene cial to the person or is appropriate to the age, intelligence, or mental status of the person is valid; any other civil juris c act performed by such a person is valid if a consent or ra ca on is obtained from his legal representa ve. A third person involved in the act performed by a person with limited capacity for performing civil juris c acts may request the legal representa ve of the la er to ra fy the act within 30 days from receipt of the no ca on. Inac on of the legal representa ve is deemed as refusal of ra ca on. Before such an act is ra ed, a bona de third person is en tled to revoke the act. The Revoca on shall be made by no ce. Ar cle 146 A civil juris c act performed by a person and another person based on a false expression of intent is void. Where an expression of intent deliberately conceals a civil juris c act, the validity of the concealed act shall be determined in accordance with the relevant laws. Ar cle 147 Where a civil juris c act is performed based on serious misunderstanding, the person who performs the act has the right to request the people’s court or an arbitra on ins tu on to revoke the act. Ar cle 148 Where a party by fraudulent means induces the other party to perform a civil juris c act against the la er’s true inten on, the defrauded party has the right to request the people’s court or an arbitra on ins tu on to revoke the act. Ar cle 149 Where a party knows or should have known that a civil juris c act performed by the other party is ti ti ti ti ti ti ff ti ti fi ti ti ti ti ti ti ti ti ti ti ti fi ff ti ti ti ti fi ti ti ti ti ti fi ti tt ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti fi ti fi ff ti ti ti tt fi ti fi ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti 18