I found very interesting article for the gold purity of 24k pure gold.  This is an actual current reality at Korea market.

Jewelry newspaper is purchasing current gold samples at random in Seoul.  That shows all different gold purity.

I never use market gold in Seoul but only 9999 LS gold with additional cost.  Korea government approve gold purity from 99.5% to 99.9%.

I am purchasing 9999 purity raw material of 24k gold only.  Chinese manufacturer has less purity than Korea that I already had

investigated at ebay store.