Overview of FPC Proofing: FPC proofing is the production of product samples. Therefore, FPC proofing is the production of samples entrusted to manufacturers to confirm whether the circuit design and product production plan are feasible before the mass production of FPC flexible circuit boards. Generally, the production quantity is very small. Is FPC proofing charged? Is FPC proofing charged? There is no absolute answer to this. The market strategy of FPC manufacturers, sample difficulty, sample delivery time, length of cooperation and other factors will affect its results. However, judging from the current development trend of FPC boards, manufacturers that charge for FPC proofing have accounted for the vast majority, and the reasons are as follows: First, the cost issue. Cost is an important indicator that any enterprise must evaluate. In the flexible circuit board industry, to produce a piece of flexible board, no matter how many, the manufacturer must invest a certain amount of cost, such as labor, materials, technology, water and electricity, etc. The production process of producing 1pcs and 1Kpcs of FPC is equal. The large number of samples will bring certain cost pressure to the manufacturer; Secondly, market factors. In the FPC industry, there are "good and bad mixed". There are real demanders, but there are also countless middlemen (especially individuals) doing trade. In order to minimize costs, such traders often defraud manufacturers to make FPC samples, take the samples, and sell them to other traders or demanders, and then they will not place orders again, which will cause large losses to the company; Third, the proofing fee can attract the attention of manufacturers, thereby guaranteeing delivery time and quality to a certain extent. Distribution of FPC proofing manufacturers: FPC belongs to the electronics industry, which is concentrated in the Pearl River Delta region of Guangdong, especially Shenzhen, which has become a world-class electronics market. Therefore, FPC manufacturers are mainly distributed in coastal areas such as Shenzhen, Dongguan, Zhongshan, and Zhuhai.