Chinese bookmarks are diverse in material, ranging from brass and stainless steel to sandalwood, silk, and high-quality paper. For metal bookmarks, look for hollow-out etching (photo-chemical machining) and 24K gold or silver plating to prevent oxidation. For wooden varieties, ensure the use of natural Phoebe zhennan or sandalwood with a moisture content below 12% to prevent warping. Traditional crafts like embroidery, tassel attachment, and lacquerware should be inspected for neatness and thread tension.