Zijin is a unique precious metal in Russia, which is usually used to make jewelry. Its value mainly depends on purity and weight, compared with Huang Jingui. Red stone is a common gem, and its price is slightly lower than that of Zijin, so Zijin is more expensive.
Question 1: John, the jeweler's repairman, took risks when stringing pearls for customers and detained one without permission. Later, under the k