The so-called "red certificate" refers to the ownership of houses and land in this red book. In other words, the tone is relatively straightforward, which means that this house and this land are all owned by individuals, that is, personal private property.
The green notebook is actually a real estate license, but it only shows that this person has the right to live and use this property, but it is not this property, not his personal private property. And the use of this house is limited, not always.
The biggest difference between a big red room and a green room is that the red room belongs to an individual and can be used as a transaction mortgage, or it has some other functions and is protected by law. On the contrary, green access cannot be mortgaged or traded. It has only one right to live in this house, and all other rights are not owned by this person.