How to do Genshin Impact Tiandaogu decryption task?

The specific operation method of Genshin Impact Tiandaogu decryption task is as follows:

1. Go to Tianqi Valley to challenge first, and click Start.

2. Then use the action of rock elements to build a ladder.

3. You need to use the skills of rock elements to build a ladder on each floor.

4. Just fly directly to the last floor.

5. Then jump on the stone pillar to get the stars.

In this way, we can unlock the secret of this task and show that the challenge has been achieved.