Due to the scarcity of Spiritual Energy on Earth, both plants and animals are far less robust compared to ancient times when legends told of people living several hundreds to thousands of years, whereas now, those who live past a hundred are few and far between.
The reason behind this was the scarcity of Spiritual Energy. People consumed grains and as they aged, more and more waste accumulated inside their bodies, and their meridians were severely blocked.
Previously, Tang Yi had unblocked Wang Xiaocao's meridians. Since Xiaocao was still young, the blockage in her meridians was less, so she could tolerate the pain when her meridians were being unblocked. However, Li Youren was no longer young, and his meridians had been damaged due to forcibly practicing, so when Tang Yi's Innate Gang Qi entered his body, it caused him unbearable pain.
