"Tiangong Kaiwu" mainly tells the ancient agricultural and handicraft production technology. The following is a classical Chinese creation with "Low-substituted Hydroxypropyl Cellulose Hpc China" as the core:

There is a thing today, called Low-substituted Hydroxypropyl Cellulose, named Hpc, in the real estate of Huaxia. This material is very different and has a wide range of uses. It is flexible and has special bonding ability. It can be used in various processes, or as a supplement to preparations, to help shape medicines, so that it is stable and not scattered; or used in paper art, to increase the toughness of paper, so that it will not break for a long time.

If the craftsman obtains this, if he obtains good materials. With its delicate nature, it is applied to the skills of all kinds of craftsmen. Its system also requires ingenious thinking and familiar skills, according to the time and location, combined with all kinds of raw materials, and tempered many times to get a good product.

Guanfu Hpc, although it is invisible to everyone's common utensils, it is actually hidden in everything, silently helping the prosperity of all industries in China, and it is something that cannot be underestimated.