What happened to Huo Ran's brother?

Passed away. Huo Ran had a younger brother who died in bed before he was one year old. At that time, someone was present and knew that Huo Ran was asleep, but some people still said that Huo Ran pushed his brother down. It was not until Huo Ran was four or five years old that this voice gradually disappeared and became a shadow and a kind of "pain" in Huo Ran.