In the SMT (Surface Mount Technology) workshop of Santroll Electric, the automatic production line is producing PCB board for electric bicycle controller, which is known as "brain" of electric bicycle. With innovative automatic printers, high-speed mounting machine and medium-speed multi-function machine, it can realize material change without machine stopping, and the mounting precision can be controlled within 40 microns, which helps to greatly improve the stability of the controller. Among these machines, the high-speed modular mounting machine has a mounting speed up to 0.036 second/point, and the output has increased from 30 million points to more than 300 million points each month, with annual accumulative output of 1.8 billion points. As introduced by Zhang Jianjie, a workshop director, now the workshop has the major advantage of flexible production in addition to higher efficiency. "In the controller market, the products have quick upgrading and high standards. Our equipment and workers can be adjusted flexibly at any time, so that we can start production immediately after standard verification. Thus, our products can maintain a share of more than 90% in the market of shared bicycle controller."