They were the same person!
Fang xingzhi actually had some understanding of he zhengdao, and he could tell from his match with Yan Zhengming that even if he zhengdao was more talented than Yan Zhengming, there was a limit to his strength. The reason why he asked Yan Zhengming was to confirm his own guess.
After Fang Zhengming's explanation, Fang xingzhi was silent for a moment before slowly saying,""You're right. Even if he zhengdao is stronger than you, he's not much stronger. There must be a reason why he was able to comprehend the ultimate skill left behind by your Grandmaster, and there must be a hidden reason for him to be able to repair elder Wen's life-saving soul tool. "
"What do you mean, my Lord?" Yan Zhengming was confused and asked.
"Perhaps the key lies in Xi Chuling." Fang xingzhi finally voiced his suspicions.