1. Forge or alter evidence to prove your claim. 2. The fictitious legal relationship and the corresponding facts are defended after the facts claimed by the other party have fulfilled the burden of proof. 3. The statement of the facts of the case is inconsistent, there are major contradictions and it is impossible to make a reasonable explanation. 4. Conceal that the other party has fulfilled part or all of its obligations, and cannot make a reasonable explanation when claiming its rights.
Legal basis: Article 305 of the Criminal Law of People's Republic of China (PRC) refers to the behavior of witnesses, experts, recorders and translators who intentionally make false proofs, experts, records and translations of important cases in order to frame others or conceal criminal evidence. Those who commit perjury shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention; If the circumstances are serious, they shall be sentenced to fixed-term imprisonment of not less than three years but not more than seven years.