1. There are many kinds of flat bottom materials, such as gypsum board, glass board and foam board. 2. Copy the drawings to the backplane. 3. Glue along the line with a needle. 4. Mix the colored sand and glue evenly and carefully color with a spatula. When the water is dry, the framed frame can be sold. Materials are generally scissors, tweezers, gold wire, colored sand, glue and silk.