I am an employee of Chow Tai Fook. At present, Chow Tai Fook owns both pure gold and thousands of pure gold prints. The main parts of these two kinds of gold are the same, both of which are made of raw materials of AU9999. The difference is that pure gold is welded with traditional solder, and thousands of gold is welded with laser. The difference in retail price per gram is 3-4 yuan. Actually, for you, this can be ignored. In fact, the effect of soldering is better and stronger! The current national standard only recognizes the names of pure gold and thousands of gold. Jewelry produced by patented technology without solder was printed with the words "ten thousand gold" a few years ago, but it was later banned by the state. Many manufacturers changed the words to "AU9999", which is actually equivalent to Chow Tai Fook's current "ten thousand gold"! Some brands just deliberately want to distinguish themselves from other brands. You can check Baidu. 9999 gold was first created by Chow Tai Fook in 1956, and it was stipulated as the fineness standard of gold jewelry in Hong Kong in the gold products legislation of the Hong Kong government. At present, Chow Tai Fook in Hong Kong is still printing 9999 characters, because the standards in the two places are different.