The reason Chu Qianli is convinced that Hua Rong has disappeared is primarily because Shiyi heard that Madam Cui's people had been searching for someone in the Imperial City all along.
However, during those days, they were all beside Chu Jiangnan, including Feng Yexuan.
The Prince ordered the entire palace sealed, forbidding anyone to enter or exit.
If Madam Cui's people were indeed looking for someone during those two days, and now Hua Rong is not in Feng Yexuan's team.
Then, Hua Rong must have gone missing long ago, but Madam Cui's people simply couldn't pass the news to Feng Yexuan.
"Shiyi's people didn't dare get too close to the Yexuan Prince's team, so they don't know whether Hua Rong was with them or not."
"As for Feng Qihe's team, when they left, no one was paying attention. By the time people started noticing, they were already within Beiming's territory."