Jiang Yifan obviously already understood the key points of the matter. In this monarchy-based feudal society, trying to continuously advance something is incredibly difficult.
Perhaps during this monarch's reign, a policy may be of great interest, but when the next monarch ascends the throne, because of personal views and intentions, it might be completely overturned, and then disappear without a trace.
Just like the very developed maritime industry of the Ming Dynasty. Several monarchs of the Ming Dynasty banned sea trade according to their own understanding and preferences and then reopened it for some reason. Later, they reopened it again, only to ban it once more. It completely did not give the maritime industry a chance to further develop or even transform into expanding mainstream trade.
