When Han Siqu was in the Capital City, he hadn't met Yun Feng, so he didn't know if the person he encountered was who Han Jing was looking for. They were just passing strangers; that person helped him save Jiangnan, so naturally, he told him everything he knew about the situation in Hanwu Forest.
He remembered inquiring about the location of Ice Lake, saying he wanted to find something.
Having stayed in Hanwu Forest for a few years, he had adapted to its environment. In order to hone his cultivation, he frequently ventured into the forest, so he knew the location of Ice Lake and how to reach it safely.
So he shared all he knew with that person.
As for other things, he truly wasn't clear about them.
"What kind of place is Ice Lake?" Han Jing asked.
