tigers.

S5: If you visit Changbaishan, you can study the unique plants and animals, walk in the mountains, see the spectacular waterfalls or to bathe in the hot water pools.

S6: In my opinion, it's a pity if you don't visit Lake of Heaven - the most popular attraction in the reserve.

T: I agree with you. How about Question 4?

S7: I think the name of Tianchi comes from some fairy stories. Maybe people believe the lake is a gift of the heaven.

S8: Long long ago, there wasn't a lake on the top of the mountain, but one day the volcano erupted, people were frightened and didn't know what had happened. One day, they found a lake appeared on the top of the mountain. Where did the lake come from? People couldn't explain it, so it was named Tianchi.

S9: I think the reason is that the lake is on the top of the mountain. It's 2,194 metres above sea level. And the view is very beautiful, which makes you feel like in fairyland. So the lake is named Tianchi.

S9: As we all know, it's very cold in Northeast China. Changbaishan must be covered with thick snow in winter and there are boiling rocks under the crater of a dead volcano. The snow melted and gradually a lake formed in the crater.