He requested the original designs from Sun Lei and reviewed them from start to finish. With the help of Sun Lei's simple explanation, he almost completely understood them. Then, he continuously used the "Supervision Law" to search for problems within the design.
In addition, he would also apply the "Correlation Law" to identify areas in the design that affected the compressor, turbine, and other components. He would then make appropriate adjustments or identify the source of the issues.
Once he started looking, a great many issues surfaced.
Listing all the issues was an extremely complicated task on its own.
Zhao Yi was very patient. Compared to complex mathematical proofs, the current content was much simpler. Some minor issues were simply recorded. A combined use of the "Connection Law" and "Supervision Law" could immediately resolve these problems. As he recorded issues, he also drafted solutions.