First, the gap between the door and drawer of the furniture. If the seam is too large, it indicates rough workmanship, and over time, it may also deform; Second, whether it is a single-packed box or a double-packed box. Usually, apart from the outer layer of board, there should be another layer of panel inside the furniture. This is called a double-packed box. Furniture with double-packed boxes is both beautiful and sturdy.