Leng Hanzhe genuinely cared for Mu Ying. When he saw Mu Ying who was about five to six years old for the first time at the age of seven to eight years old, he had already liked her then.
Mu Ying was friendlier to him when they were younger although she did not show any sign of liking him either. Even then, Leng Hanzhe liked her silently.
Since Mu Ying got into the accident, however, he found himself not understanding Mu Ying more and more.
Their parents were long-time friends and both of them grew up together. One could call them childhood sweethearts. In spite of it, it had always been Leng Hanzhe protecting and liking Mu Ying in secret.
The reason Leng Hanzhe did not even believe what Mu Ying said about "go to Amazonia again" was because he had been watching and guarding Mu Ying grow up since they were kids. For lack of better words, Leng Hanzhe knew if and when Mu Ying had gone to the toilet; it was just that he did not say it explicitly.