Add: 1. Negotiorum gestio is a management behavior for the benefit of others, and it is the fact that you have suffered losses! Negotiorum gestio is a fact. 2. He can generate debt of negotiorum gestio, which is the reason of debt. Breach of contract, infringement, negotiorum gestio and unjust enrichment are all causes of debt. Management without cause, both parties have no intention to contact in advance, and if there is, they will entrust. This is the difference between the two. 4. Negotiorum gestio is a kind of altruistic noble moral behavior, which has risen to the legal level. We can discuss negotiorum gestio from the perspective of the relationship between law and morality! I think if these four aspects are written down, there will be a lot of content!