The Shanghai copper and aluminum futures markets, which have continued their sharp declines since October 12th, have returned to normal and have rebounded yesterday. On the same day, including the Shanghai Aluminum two contracts that had just resumed trading, copper and aluminum contracts did not appear to close at any time. As a result, their daily closing range and margin levels basically returned to normal from today. Last Friday, the London Metal Exchange (LME) three-month copper rose 2.9% to 2,830 US dollars; three-month aluminum rose 33 US dollars to 1,765 US dollars. Yesterday, Shanghai Copper was affected by the external rebound, and after the market opened lower, the price rebounded from the low position. Most contracts rose slightly. At the close, the contract prices fell by 540 yuan to 550 yuan, of which the main 0501 contract closed at 27,030 yuan. The total turnover of 237,000 hands throughout the day, the total position of 23 million hands, minus 7230 hands. Shanghai Aluminum also was driven by the external rebound and continued its rebound on Friday. It opened higher and closed higher. The price of various contracts rose 230-510 yuan, of which the main 0412 contract was reported at 16,370 yuan. A total of 59,000 hands were traded throughout the day, with a total of 89,000 hand positions, a decrease of 7,948 contracts. Yesterday, due to the absence of the 3rd daily stop for the 0410 to 0503 contract, the 2nd daily limit was not seen for the 0504 to 0508 contract. In accordance with the trading rules, the daily limit of the above contract was adjusted to 3% from today and the trading margin was adjusted to 7%. The aluminium 0412 and 0501 contracts, which were suspended for trading on October 15th, resumed normal trading yesterday, but the price was far below the 8% limit. Therefore, the notice issued in the previous period stated that the percentages of the ups and downs and trading margins of the above two contracts have both returned to normal levels, ie, the price limit for the two contracts on October 19 was 3%; after the closing on October 18, the margins for the two contracts were closed. Received at 5%. In addition, the daily limit of aluminum 0504 contract on October 15 did not show a second daily limit, and the range of its ups and downs and trading margin also returned to normal levels. This also means that: From today, Shanghai's copper and aluminum futures market, the range of ups and downs and trading margins to return to normal levels, but the copper's margin is still maintained at 7% level. Earlier, during the National Day holiday, international copper prices rose sharply. On October 8, after the National Day holiday, the Shanghai copper market rose sharply under the encouragement of the international market. The major contracts such as 0411 to 0503 hit a daily limit. The Shanghai aluminum market is not far behind, with 0411 and 0412 contracts closing at a daily limit. After that, LME copper and aluminum prices continued to rise. On October 11, the copper market in Shanghai continued to rise strongly. On the 12th of October, the situation of the Shanghai copper market went sour, including the contract of 0410-0504 monthly contracts including the main 0412 contract. Market participants pointed out that the issue of the RMB exchange rate is the main trigger to trigger the decline. On October 13, despite the rumors of the appreciation of the renminbi, the Shanghai copper and aluminum futures markets continued to drop sharply. Among them, several aluminum contracts, including the main 0412 contract, closed lower. On the evening of October 13, the LME copper market experienced a rare plunge, falling by nearly 10%. LME aluminum also closed below $1,700. Affected by this, on October 14, the copper and aluminum markets in Shanghai continued to fall sharply, among which copper contracts from 0410 to 0503, 0509 contracts, aluminum contracts from 0410 to 0502, and 0505 fell. As a result of the unilateral market with continuous low limit, on October 14, the notice issued in the previous period stated that the aluminium 0412 and 0501 contracts were suspended for trading for one day on October 15. On October 15th, the Shanghai copper market continued to drop sharply, with a fall from 0411 to 0508. The Shanghai aluminum market oscillated from a low point. Analysts pointed out that the Shanghai copper and aluminum futures market's rising and falling limits and trading margins have basically returned to normal levels, indicating that the sharp fluctuations in the prices of copper and aluminum after the National Day have gradually eased, and the market has successfully withstood the test of high-risk markets.