Having 2 work locations in China

My job description in China requires me to frequently travel and work between 2 Provinces....Liaoning and Jiangsu. The company’s primary Base is in Liaoning and my living permission and residence permit reflect that. Does the Visa system cater for someone in my position who must travel between 2 locations for work, as I believe I am working illegally whenever I’m in Jiangsu..? Many thanks