Such practices include applying early-period seal marks to later works, or affixing later-period seal marks to earlier pieces. There are also crude methods such as chaotically mixing seal marks from the lid, base, and body sections, or stamping multiple seals on the bottom. In the process of authenticating seal marks, one must avoid "interpreting based on images alone" or "searching by pictures." Seal marks are static, but people are dynamic. One must look more, compare more, accumulate more experience, and think more deeply in order to effectively use seal mark authentication as a tool.