Legal analysis: The division between public law and private law was first put forward by Urbian, an ancient Roman jurist: "Public law is a law about Roman countries, while private law is a law about personal interests." According to this standard, private law follows the principle of party autonomy, establishes property ownership and protects the pursuit of its own interests.

legal basis: article 4 of the civil code of the people's Republic of China

all civil subjects have equal legal status in civil activities.

article 5 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 when engaging in civil activities, civil subjects should follow the principle of fairness and reasonably determine the rights and obligations of all parties.