Crystal: the word crystal was originally the abbreviation of crystal, and later it was extended to mean purity, purity and clarity, such as the common idiom "Crystal:crystal"
"Shuowen Jiezi" explains the cloud: it is also clean. From the third day. All crystals belong to crystals.
Xin: It means more money and prosperity. Xin is a common word for names and stores, which means that gold is more prosperous and prosperous.