In the second issue of Tianjin Social Sciences in 2021, Wu Zhongmin pointed out that the concept of sharing and the corresponding institutional arrangements are of vital purpose and cornerstone significance for the modernization drive. However, no matter how important the concept of sharing is, it is not the only concept of modernization or development. The concept of sharing has its own specific and reasonable boundary. From the perspective of basic value orientation, the concept of sharing does not mean to hinder people's free development. From the perspective of economic foundation, the concept of sharing cannot be separated from the market economy. From the perspective of actors, sharing should ignore the responsibility of "co construction" of social members. From the perspective of public investment, sharing is not equal to high welfare policy. From the diachronic perspective of the long-term existence and development of social community, sharing should ignore the continuity between generations.