"I know," he said, but Si Yan was somewhat displeased. He hadn't felt it before, but now he thought his leg was recovering too slowly. Even though Xue Yan had mentioned that this pace was normal and that haste makes waste, there was still the possibility that rushing could make things worse.
Si Yan generally didn't hide his emotions in front of Yu Zi; if he was happy, he showed it, and if he was unhappy, that was clear as well. Therefore, whether it was before or now, Yu Zi could easily sense the changes in Si Yan's emotions.
