Legal analysis: the principles of contract conclusion: first, the principle of equality; Second, the principle of freedom of contract; Third, the principle of fairness; Fourth, the principle of good faith; Fifth, the principle of obeying the law; Sixth, the principle of fulfilling obligations according to the contract. The principle of contract conclusion runs through the whole process of contract conclusion, and the parties to the contract should strictly abide by it.

Legal basis: Article 4 of People's Republic of China (PRC) Civil Law states that civil subjects have equal legal status in civil activities. Article 5 of the Civil Law of People's Republic of China (PRC), when engaging in civil activities, civil subjects shall follow the principle of voluntariness and establish, change and terminate civil legal relations according to their own wishes. Article 6 of the Civil Law of People's Republic of China (PRC) stipulates that civil activities should follow the principle of fairness and reasonably determine the rights and obligations of the parties. Article 7 of the Civil Code of People's Republic of China (PRC) stipulates that engaging in civil activities should follow the principle of good faith.