When Qin Xiao first met him in the late Tang Dynasty, he was still a high-spirited young man in his twenties. After several years of getting along with him, he turned this twenty-eight-year-old boy into a nagging old woman.
The first time he met Qin Xiao at the end of Tang Dynasty, he was a dirty quasi-orphan. He didn't know how to fight back when he was bullied. Meng Hulu was also very stubborn. Later, when I met Qin Xiao, the late Tang Dynasty was still the silent late Tang Dynasty.
This is easy to explain, after all, Qin Xiao did all the talking.