Interlayer introduction

"Sandwich layer" is synonymous with not being able to buy a house outside the safety and market. Some of these people can't meet the requirements of low-rent housing and have no money to buy affordable housing, while others are not qualified to buy affordable housing and can't afford commercial housing. Under the background of the financial tsunami, low-and middle-income families, newly-employed workers and other "sandwich class" groups are in the blank zone between the market and government guarantee, and their housing problems are increasingly apparent. This group accounts for more than half of the urban population in China, not including the temporary population in the permanent towns.