Article 26 The state protects the lawful adoptive relationship. The rights and obligations between adoptive parents and adopted children shall be governed by the relevant provisions of this Law on the relationship between parents and children.

The rights and obligations between adopted children and biological parents are destroyed by the establishment of adoption relationship.

Article 27 There shall be no abuse or discrimination between stepparents and stepchildren.

The rights and obligations between a stepfather or stepmother and his stepchildren who are raised and educated shall be governed by the relevant provisions of this Law on the relationship between parents and children.

As you said, as long as you and your uncle go through the formal adoption procedures, from that moment on, you and your parents will have no legal rights and obligations to support and raise! !

At the same time, from the moment you go through the adoption formalities, you and your uncle have established the legal rights and obligations of support and future support!

Therefore, you must support your uncle and wife according to law and stay with your parents. You have no obligation to support them.