Minor Divine Calculation!
The so-called minor derivation comes from the combination of the number five of Heaven and the number five of Earth, known as the number of the Five Elements. The so-called minor derivation is ten, merely a small coupling; now speaking of a large coupling, it's fifty, which is the major derivation.
According to Jiang Chen's original intention, he wanted to deduce a great Divine Calculation. The number for great derivation is fifty, using forty-nine, hence the saying Heaven completes forty-nine.
This forty-nine refers to the Heavenly Dao, and the unused one, is the escaping one.
The so-called major derivation encompasses everything. It includes not only the Heavenly Dao but also the escaping one.
Thus, this is a divine ability of perfect level deduction; within Heaven and Earth, nothing is not calculated, nothing is unknown, even that slim chance of survival can be calculated, one could say it is omnipotent.