假如你是李华，你的笔友Mary对中国的孩子在春节期间收到爷爷奶奶的红包一事很好奇，她想了解红包的意义和中国孩子怎么使用红包。请根据所给信息给Mary写一封邮件。

要求：⑴必须包含所给的全部要点，可适当发挥；

⑵文中不能出现真实的姓名和校名；

⑶字数：80-100；

⑷开头和结尾均已给出，不计入总词数。

meaning of Hongbao: grow up quickly, be safe all year round,...

ways to spend Hongbao: give to parents, save, buy study materials,...

Hi, Mary,

I'm glad that you are interested in Hongbao. In China, there is a Chinese tradition -grandparents give Hongbao to their grandchildren during the Spring Festival.     ▲   

Yours,

Li Hua