Copper & Aluminium: After a long period of time falling for 5 trading days, LME copper closed above 3,000 points last night. Three times in a single day crash, three times "safe and secure", we have a full experience of the thickness of the market. Comparing the Shanghai copper's reaction under the three plunges, we will increasingly realize the market's upward capacity: On October 13th, it was plunge. At that time, the reaction of Shanghai copper was two daily limit boards; the fall on December 2 was a result of Shanghai copper's The reaction was a three-day trading in which the daily limit was added; and this time, Shanghai Copper had only one unrestricted daily limit and the market had been trading above this stoppage price until yesterday when LME copper recovered 3,000 points. "Price explains everything" --- more than one bill (10%) is retained. Shanghai Aluminum rebounded yesterday and the 503 contract price returned above 16,000. Due to the fact that the price fell into the cost zone last time and the possibility of a further fall in London's aluminum future was unlikely, the market may make a technical rebound. Due to the heavy pressure area of ​​the average systems (9MA, 18MA, 30MA, and 72MA), trading is mainly on the sidelines.