Recently, in a research activity, British United shares (002846) introduced that the company officially completed the operation of the first mass production line of composite copper foil in March 2023 and started batch sampling. Currently, four composite copper foil production lines have been built, and the construction of subsequent production lines is still being continued in an orderly manner. In terms of products, PET composite copper foil products have been sampled by many battery companies and are currently undergoing intensive testing and feedback. PP composite copper foil has recently been sampled by some leading companies, and the adhesion test evaluation is good, and continuous sampling and testing will continue in the future.