Kaiyuan securities released a research report on January 29, saying that it maintained the buy rating of Suntak Technology Co.Ltd(002815) (002815. SZ). The reasons for rating mainly include: 1) Zhuhai plant is the main plant for subsequent capacity release, and sufficient customer reserves lay the market foundation; 2) Get out of the niche market of small and medium-sized PCB and usher in the dilemma reversal. Risk tip: the price increase of raw materials erodes the cost, the downstream demand is less than expected, and the yield of high multi-layer PCB is less than expected.