"Treasure of Ji" is a special gem in Japan, also known as "sapphire" or "sapphire". This kind of gem is dark blue and very precious. In traditional Japanese culture, Kichibo represents nobility and dignity, and it is regarded as an honor to own it.

Treasure of Gitzo can be traced back to the royal family in ancient Japan. It is said that it is used to make crowns and royal jewels. At that time, only members of the royal family were eligible to wear the treasure. Its name is also derived from the royal surname "Ji" at that time.

Now, Keppel has become a universal gem, which is no longer limited to the royal family. Many people choose to use it to make jewelry as noble and gorgeous decorations. In Japan, it is generally believed that Jizhibao is a kind of precious wealth, which can bring good luck and happiness.