Previous studies on daily time allocation have shed light on individuals' trade-offs regarding time allocation within a fixed time budget. However, interpersonal interactions of time allocation with a social network are far from being understood, largely due to limited research in this area. Further, few studies have focused on residents of China, whose population is largest in the world and whose culture is quite different from western countries. Using the data collected from 261 households in Shenzhen, this study applies structural equations models to investigate time allocation of male and female household heads on the weekday and weekend. The results show clear household activity roles of Chinese residents: men are dominant in out-of-home activities, but women dominate in-home activities. This study also offers some insightful interpersonal interactions of activity participation between household heads.