"Liu Jinan Jiagongfu Needle Shop" copperplate is a kind of printing advertisement in Song Dynasty. This advertisement is engraved on a copper plate, with a height of 13cm and a width of 12.5cm. Just above the copper plate, the title of "Liu Jin's Anjia Kung Fu Needle Shop" is engraved, and below it, there is a more detailed advertisement: "Buy superior steel bars and make fine needles for Kung Fu, people can use them without cutting corners, and customers will turn to vendors. Please remember that there is no extra allowance." In the middle is a picture of a white rabbit tinkering with medicine. On both sides of the picture are "Please recognize the white rabbit in front of the door". This is a quite complete and exquisite print advertisement. From the title to the image, the copy is readily available, with clear anti-counterfeiting marks, which systematically and indirectly explains 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 quality of raw materials and products, an explanation of sales methods, and a marketing method of "small profits but quick turnover". In addition, it also pays attention to trademark awareness and brand awareness. This fully shows the height of ancient commercial advertisements in China.

The seal of "Qi Tie Official Seal" is the seal of Qi State's management of iron industry and its own iron official in the early Western Han Dynasty.

The common theme of these two studies is the development of ancient OEM business in China.