Strength level, energy level.
If the former is high, it greatly affects the individual's constitution, while if the latter is high, everyone would become a mage. There can be compensations between strength levels and energy levels, but extreme imbalances may also occur.
The reason Zheng Yichen prefers such precise judgments is that he takes into account the possibility of extreme imbalances.
From his current personal feeling, his strength level should not be low, and his energy level shouldn't be too low either. If an individual's energy level is low, even if they go to a higher-level world and are adjusted by the environment, they won't sense much free energy. They would be just like ordinary people moving to a higher-level world—still ordinary people, at most able to carry an extra ten or twenty pounds.