While over-hyping Chinese airships as spy balloons, the U.S. has turned a blind eye to the fact that it has repeatedly infiltrated other countries. Its methods range from U-2 spy planes flying over China's airspace in the 1950s and 1960s to more than a dozen releases of spy balloons since May last year and the "PRISM" scandal revealed by Edward Snowden in 2013. Speaking to CGTN, diplomatic scholar Gao Fei said it would be more sensible for the two countries to establish rules for future contingencies than to go back and forth on such a tiny issue.