On April 27, 2013, the State Quality Inspection Quantity Letter [2013] 217 of the State Administration of

On April 27, 2013, the State Quality Inspection Quantity Letter [2013] 217 of the State Administration of Quality Supervision, Inspection and Quarantine approved and issued 26 national standard substances, such as "Gold Ore and Gold Concentrate, Nickel Ore and Nickel Concentrate, Lead Ore, Aluminum Alloy Spectrum, Copper and Copper Alloy Spectrum", which were developed by Jinan Zhongbiao Science and Technology Co., Ltd. The license number for manufacturing measuring instruments is "10001248" and "National Standard". Things 10001251".