What is Yu Ying photoelectric smt daughter board used for?

This is surface mount technology. Yu Ying photoelectric smt daughter board is a surface mount technology, that is, electronic components are punched on the PCB board by equipment, and then the components are fixed on the PCB board by furnace heating. The SMT workshop needs ventilation, and employees need to wear work clothes and protective gloves when working, because they will come into contact with some chemicals when working.