"Jinan Liu Jia Gong Fu Needle Shop" copper plate was a printing advertisement in Song Dynasty. This advertisement is carved on a copper plate, which is 13 cm high and 12.5 cm wide. Just above the copper plate, the title "Jinan Liu Jiagong's Needle Shop" is engraved. Below it is a more detailed advertisement, "Buy the finest steel bars, make fine needles, and use them for people without stealing work. Customers turn into vendors, so please remember that there is no extra allowance". In the middle is a picture of a white rabbit mashing medicine, and on both sides of the picture are "Please recognize the white rabbit in front of the door". This is a quite complete and exquisite engraving advertisement. From the title to the image, the copy is readily available, and there are clear anti-counterfeiting signs, which systematically and indirectly explain the manufacturing raw materials and sales methods of Kung Fu fine needles. In addition, from the advertising strategy, this print advertisement is quite mature. In this short advertisement, there is an introduction to the raw materials and product quality, an explanation of the sales method, and the marketing method of "small profits but quick turnover". In addition, attention has been paid to trademark awareness and brand awareness. This fully shows the height of commercial advertising in ancient China.

The seal of "Qi Tie Guan Seal" was the seal of the early Western Han Dynasty when Qi State managed the iron industry and set up its own iron official.

The same theme of these two things is the development of ancient foundry business in China.