2. Fix the four corners with glue. When assembling the four corners, don't apply too much glue or edges, otherwise it will overflow and stick to the frame. Press it for five minutes to ensure it is firm.
3. Reinforce the four corners of the oil painting frame with corner protectors to make the four outer corners more stable.
In this way, a picture frame is assembled, and the oil painting is embedded in the outer frame from the back.
5. Fix the oil painting and the outer frame with the mounting fixture, and finally complete the assembly.