Group 1 - The company, Stitek (301568.SZ), confirmed that its core products are 3D solder paste inspection (3D SPI) and 3D automated optical inspection (3D AOI) equipment [2] - These products are primarily used in the quality inspection phase of surface mount technology production lines for printed circuit boards in the electronics assembly sector [2] - The equipment can also be applied in the inspection of lithium battery protection boards [2]