This investigation examined whether intergenerational exchanges of time and money resources between older parents and their adult sons in rural China were conditioned on sons' migration status. Data derived from 2001 and 2003 waves of a longitudinal study of 1,126 parents, aged 60 and older, living in rural areas of Anhui Province, China, and their 2,724 adult sons. Random-effects regression analysis showed that marginal financial returns to parents of providing grandchild care services and financial assistance were greater from migrant sons than from nonmigrant sons. We explain these results in terms of strategic investments in the earning potential of migrant sons and the bargaining power wielded by grandparents who care for dependent children of migrants. (Contains 3 tables.)