What is better to engrave on the event board?

Wuwuban is a handicraft carved by Lu Zigang, a famous jade carving master at the end of the Ming Dynasty, which symbolizes peace and carefree. It is said that as long as you make a wish or blessing on "no card", it is possible to realize your wish and protect your life.

There are four main materials for event cards: precious wood, metal, precious stones and animal bones.

Wood: agarwood, mahogany, nanmu.

Metals: copper card, silver card.

Gems: jade brand, amber brand, beeswax brand and sapphire brand.

Bones: ivory and black buffalo horn.