Similarly, it is impossible to have a tiger pendant now.
Nana Ogawa has taken the tiger away and is about to open the treasure chest, so he must press its secret.
According to the method of treasure chest, it must be 5 rings to open it.
There is also a saying that Nana Ogawa wanted to go back to modern times and find the treasure chest of the Qin Dynasty. It needs a ring to open it at the same time. (that is to say, it is necessary to understand that modern and ancient times can be opened together)
You can see the problem you mentioned here.
Because in the third episode, my girlfriend and I celebrated the Mid-Autumn Festival in Nana Ogawa. I called this in the third episode. Now I have found out the key structure inside the treasure chest. I infer that this is a chain that has been lost for many years. In fact, anyone can open it as long as they find the missing part and reinstall it.
There are five blanks in this picture corresponding to the five concave lines on the treasure chest, one for us on each side. Just fill in five positions and the lock will be opened.
At the same time, Nana Ogawa found an ancient treasure chest and put it on it (that is, put a tiger pendant). The treasure boxes will be connected, and he will return to modern times, but in the end, he may not come back, but it is not the end after all.