Flexible production can be achieved, and there are multiple styles to choose from according to the tray load, such as synchronous belt line, substrate belt line, double speed chain line (single speed, 2.5x, 3x), umbrella tooth roller conveyor line, etc. Modular design with corresponding control mechanisms to choose from, such as blockers, positioning, lifting and lateral movement, elevators, etc. According to the customer's layout, building blocks can shorten the design cycle, achieve high flexibility, and low cost