| In 1990, Xiang Shan Tong Da electrical appliance factory came to existence. |
| In 1997,updated to Xiang Shan Heng Zhou electron co., ltd. |
| In May 1998, moved to Xiang Shan east suburb industrial park. |
| In Feb 2000,passed the ISO9001:1994 quality management system certification, then updated to ISO9001:2000 quality management system certification in 2003. |
| In 2002,Xiang Shan Shang Yi plastic goods manufactory under commend set up. |
| In 2003, Shanghai office came into existence to unfold external work with window character. |
| In Mar 2004, Shang Hai Lei En curatorial appliance system co., ltd. was founded taking up with producing injection pump、transfusion pump and so on and distributing part of foreign top curatorial equipments. |
| In July 2004,5s started up to make our company look brand-new. |
