Nian Shiqing is a brand used by Guangzhou Nian Shiqing Jewelry Co., Ltd. (Sino-foreign cooperation) to promote life commemorative diamonds (ashes/hair synthetic diamonds) in Chinese mainland. "Year" means nostalgia, "time" means lifelong, and "affection" means deep affection. Together, it means "I miss his (her) affection all my life". Life commemorative diamond (or life diamond) is a diamond that extracts carbon from relatives under the conditions of high temperature and high pressure in the laboratory to simulate the growth environment of natural diamonds. It not only has the same physical properties, chemical composition and optical properties as natural diamonds, but also has a high commemorative value, because diamonds are eternal. At present, many authoritative evaluation agencies in the world (including IGI, GIA, HRD, etc. ) has recognized this kind of diamond, accepted its appraisal business and issued corresponding certificates.