Tech company Tiancheng Technology (688603.SH) recently stated during a roadshow that PCB horizontal sinking copper and electroplating specialty chemicals are the company's core technology products. The company is constantly expanding its applications to downstream customers. With the continuous accumulation of technology and the recognition of more customers, the current expansion rate of the company's horizontal sinking copper and electroplating products is showing a good trend. The domestication rate of these products is relatively low, and they are mainly dominated by foreign companies such as DuPont, Ametek, JCU, and MacDermid. The company will continue to achieve import substitution through independent innovation, promote the domestication rate of high-end functional wet electronic chemicals, and solve the key bottleneck problems.