The reason Old Madam He wanted to report Lu Xingzhi was not only because she disliked Lu Xingzhi and Jiang Yao, but also because she felt that Lu Xingzhi had a good relationship with Colonel Lin, that Lu Xingzhi's family was wealthy, and that he had a college-bound wife. She was afraid that Lu Xingzhi would become her son's biggest competitor in the army in the future, so she reported Lu Xingzhi.
The previous morning, when she learned that Lu Xingzhi had been promoted to captain, she felt that she had done the right thing. Her son had not been promoted that year, but Lu Xingzhi got one. It meant that the man was her son's rival.
After she reported Lu Xingzhi, Old Madam He gathered information. When she found out that Lu Xingzhi and Jiang Yao had been called for some questions, she felt smug about it. She felt even better when Jiang Yao said that she would divorce Lu Xingzhi. She had done a great deed, but she could not talk about it.