Guilty conscience
The men hired by Uncle Ji were professionals and they were rather quick on their feet as well but they forgot that the people they were trying to hurt were protected by the Shen brothers and what was more the Lin brothers weren't someone who needed anyone's protection anyway.
Just as the man who was in charge of lighting the fire raised his hand to pick up the lamp that was already ignited but just he was going to light the house on fire, a sudden whoosh of air came from his side and the lamp was burning just a moment ago was extinguished.
Surprised the man looked behind him but there was no one, he scratched his head and picked up a matchstick and lit up the lamp once again but just as he lighted it again, there was another whoosh of warm air and his lamp was once again extinguished. The man was shocked as he looked around and put down the lamp on the ground, as he lightly called, " Who is there?"