What type of visa do I apply for if I will accompany my husband on his business trip to China?

Leslie, you can just apply for a tourist L type. In order to apply for it, you should submit your valid passport, a photocopy of the passport, a filled-out application form attached with your recent color bare-headed photo, and an invitation from your husband or a relevant individual or entity in China or round-trip tickets and hotel bookings to the CVASC in Canada.