The traditional palace bag-box making technique is a national intangible cultural heritage. The traditional palace bag-box making technique is referred to as "bag-box making", and its history can be traced back to the "box making" in the Imperial Household Department during the Yongzheng period of the Qing Dynasty. After the abdication of the Qing emperor in 1912, the box-making craftsmen were exiled to the people and continued to make bags in the brocade box shop. After the founding of New China, the craftsmen returned to the Palace Museum one after another to pass on the bag-box making technique, which has been passed down for four generations. There are many types of bags. According to the type of inner bag, they can be divided into soft bags, inverted bags, hollow bags, hard bags, soft and hard combinations, etc.; according to the type of cultural relics, they can be divided into book covers, calligraphy and painting, ceramics and jade, bamboo, wood, ivory and horn, gold and stone clocks, etc.; according to the type of classification, they can be divided into dark-type bags, bright-grid combination, hollow-bag door-covering, top and bottom cover, pull-out, etc. This technique involves more than a dozen processes, including style setting, size calculation, cardboard cutting, drawing the base line for the booklet, gluing the outer box, gluing the concave strips on the upper cover, etc., and the outer box is mostly made of imitation Song brocade. The final configured cultural relic box is as close to the contents as if it were tailored to the size of the clothes. On May 24, 2021, the traditional court box-making technique applied by the Palace Museum was approved by the State Council to be included in the fifth batch of national intangible cultural heritage representative projects.