Countries are fiercely competing for data management and control rights related to data sovereignty, which has seriously hindered the globalization of the digital economy. The modest construction of data sovereignty has become the key to breaking the situation. Countries have shown a general aggressive expansion of data sovereignty, while some countries have developed a radical form of expansion. Jurisprudentially, data sovereign modesty is indeed necessary for the coordination and suppression of radical expansion. In rule construction, the principle of modesty requires a dynamic balance between defensive and offensive data sovereignty.  The construction of a single defense-oriented non-cyber power is a reasonable path. The construction of my country's data sovereignty should be based on the principles of compatibility, cooperation and self-restraint, and coordinate the different interests between the free flow of data and the safe flow of data. Appeals to realize the controlled flow of important data and the trusted flow of non-important data.