We all know the fact that gold leaf is not easy to make. You can imagine how much effort it takes to hammer a gold brick into a thin foil.

In the production process, the Wu Jin paper plays a huge role. To create gold leaf, you need to first wrap the gold piece in Wu Jin paper. This means that the Wu Jin paper needs to be impact resistant, heat resistant, thin and unbreakable.

At the same time, with the development of the times, the traditional Wu Jin paper had many shortcomings, such as short life span and low genuine rate. At this time the developed countries gradually produced better Wu Jin paper, as a state secret, which can not be divulged. Then Japan was ready to declare the "gold leaf making process" as a world intangible cultural heritage item. If Japan had succeeded in its bid, China's gold leaf manufacturing industry would have been marginalized and eventually become a companion of other countries.

Faced with such a dilemma, the gold leaf factory in Nanjing, China, came forward and, as the most powerful representative at that time, decided to compete for time to develop a "new type of gold paper". After three years of research and development, the "new type of Wu Jin paper" finally appeared in 2000. Compared with the traditional Wu Jin paper, the new type is coated with a special high-temperature resistant adhesive layer on both sides and can withstand millions of blows without deformation. Because of this, the quality of gold foil has been upgraded to a higher level.