Which episodes are involved in Di Renjie's detective story about Li Yuanfang becoming aquatic?

From episode 25,

Li Yuanfang, Lu Jiying and Ning's family sneaked into the Yingbin Post to take out the secret message, making a diversion from the West, and split up in two ways in an attempt to get rid of the gangsters who were chasing after them. However, Li Yuanfang paid a heavy price for it. Although he defeated the top ten masters of the other side with peerless martial arts, he eventually sank into the Grand Canal because of exhaustion. The gang leaders are still in shock. They have never met anyone with such superb martial arts.

To restore memory in episode 47

When he returned to the reed, he picked up Xiaoqing's body and cried. Only to find that the woman in my arms is not Xiao Qing but Yun Gu. Yungu struck like lightning-but she couldn't kill Li Yuanfang. In a fierce battle, Li Yuanfang stood with Yungu and Xiaoqing. In the fierce bloody battle, Li Yuanfang actually fell into the water to relive the feeling of frustration at that time and found himself as a general of Qian Niuwei. Regrettably, Xiaoqing gave her young life.

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