China’s affordable housing program includes 1) _____ low-rent housing for the most 2) _____ challenged residents, public rental houses for those 3) _____ earners who cannot purchase a house in the cities, and upgrades of 4) _____ slums.Vice premier Li Keqiang also stressed a couple of issues that might arise during or after the completion of the construction of affordable housing. These issues include:5)_______,6)_______.