The room of I Ching

The room of I Ching is placed right beside the entry
Press the combination lock right at the door
Press both the top left and top middle button
Take the book from the cupboard
Open the drawer under the vase
Double click the side of the drawer
Take the kimono
Turn to the door
Take the left spear from the cabinet
Click the Lamp Tuis (top left of the door), you get three coins
Turn to the altar
Sacrifice the coins by putting them on the altar (three times)
There is an explanation and the page in the book is filled out

The observatory