After Leng Wuxin abducted Lu Li from the Inferno, she had never abused him. She never even laid a hand on him. Instead, she was treating him politely. She educated Lu Li about situations in the Central Imperial Universe, and she also gave him Zen Bead and other elixirs.
Lu Li had formed the wrong idea that Leng Wuxin was asking for a favor, which had led to a lack of crisis awareness on his mind.
But the slap woke him up. He finally understood that he was merely a puppet for Leng Wuxin. His life was controlled by her who could rip him to shreds at any time.
He had crossed the line by egging Leng Wuxin to snatch for the treasure. He had offended her, so she slapped the reality into him. She reminded him that his life was in her hands.
The lady was beautiful but toxic. She was cruel and cold-blooded!
