Which company in Shanghai produces pacemakers?

So far, there are only two kinds of pacemakers that can be called domestic pacemakers:

1. Shaanxi Qin Ming Electronics-a real domestic pacemaker, but its performance ... (you know).

2. Medtronic once assembled a batch of its Sigma series pacemakers in Shanghai, but it has been discontinued for a long time (Medtronic is the most famous pacemaker company in the world)-imported brands, only assembled in China, it is also considered domestic!