A special gift for Valentine's Day is causing a stir in Shanghai.

When a young woman surnamed Wang opened a gift box from her boyfriend, a pair of beautiful butterflies flew out. Wang then shared the creative idea with many netizens, who loved it. Usually the gift will include two species of butterflies. According to a website selling such gifts, the lifespan of a butterfly is 7-10 days.

According to insect experts, the powder on

the wings of butterflies is usually harmless, but some special species of butterflies may have poisonous powder on their wings.