Do I have to live in Shanghai to get Z-visa?

Hi there, I am now working in Hong Kong for a Swiss company but I am also required to travel often to Shanghai and work at the office in Shanghai. Currently I have a Hong Kong work permit. If I have to work for at least 180 days in Shanghai and I would need to have a China work permit, does it mean that I have to move and live in Shanghai so that I could get the China work permit or Z-visa? Also, is it possible to have Hong Kong work permit and China work permit simultaneously? I appreciate your answer. Thanks!