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Scientists observed semi-Dirac fermion for the first time, and scientists from Pennsylvania State University and Columbia University joined hands to observe a special kind of quasi-particle-semi-Dirac fermion for the first time. Such quasi-particles have mass when moving in one direction, but lose mass when moving in the other direction. The researchers said that in-depth research on these quasi-particles is expected to promote the development of next-generation batteries, sensors and other technologies. Related papers were published in the new issue of Physical Review X.Goldman Sachs upgraded Societe Generale to neutral. Chris Hallam, an analyst at Goldman Sachs, had a previous rating of sell. The target price is 29.25 euros, which is 9% higher.Front page of China Securities Journal: Give better play to the role of "stabilizer". The reform of the investment side of the capital market has been solidly promoted. The front page of China Securities Journal stated that efforts should be made to break through the blocking points of social security, insurance, wealth management and other funds entering the market, steadily promote the reform of industry rates in Public Offering of Fund, and vigorously develop equity funds, especially indexed investment ... Recently, the reform of the investment side has been accelerated, helping to improve the function of the capital market in which investment and financing are coordinated. Market participants expect that in the next stage, around the key directions such as guiding "long money" to enter the market, enriching the product system, and promoting the development of indexed investment, the reform of the investment side will continue to be solidly promoted, and more new measures are expected to be researched and introduced, which will introduce more incremental funds to the market and better play its role as a "stabilizer" of the market. The market expects that the acceleration of investment-side reform will significantly increase the scale and proportion of medium and long-term capital investment, promote the long-term investment behavior and enhance the inherent stability of the capital market.

The Jehad delegation will discuss the exchange of detainees with Israel. On the night of 11th local time, the Palestinian Islamic Jihad (Jehad) said that the delegation including its Secretary-General Zeyad Nahara had arrived in Cairo. The delegation will discuss the latest progress of the agreement on the exchange of detainees with Israel and the ways to provide assistance to the Gaza Strip.Canada's stock index closed up 0.6% on the day when the central bank cut interest rates, Brazil's real rose over 1% on the day when the central bank raised interest rates, and Canada's S&P /TSX composite index closed up 0.60% at 25,657.70 points, approaching the closing record high of 25,691.80 points on December 6 and the intraday record high of 25,843.20 points on December 9. Small-cap stocks closed up 0.74% at 847.15 points. In late North America on Wednesday (December 11th), the yield of Canada's 10-year benchmark government bonds rose by 6.7 basis points to 3.085%. The yield of debt increase in the two-year period rose by 5.3 basis points to 2.941%. After the US CPI inflation data was released at 21:30 Beijing time, the refresh rate was as low as 2.827%. After the Bank of Canada announced a 50 basis point interest rate cut at 22:45, it pulled back steeply from 2.84% to 2.960% at 03:06. The yield of five-year debt increase rose by 6.1 basis points to 2.891%. Mexico Composite Index closed down 0.17%, while Mexican peso rose 0.11% against the US dollar. The index of Sao Paulo Stock Exchange in Brazil closed up 1.06% to 130,000 points, and since it rose to a record high of 137,000 points on August 28th, it has been continuously and smoothly adjusted back. The Brazilian real rose by 1.43% against the US dollar, and it was reported at R $5.9647 before the Brazilian central bank raised interest rates by 100 basis points and predicted that it would raise interest rates in the next two times.Meta's Instagram said that its service has returned to normal after the interruption. According to Downdetector.com, a network status tracking website, after thousands of users encountered technical problems when accessing the Instagram platform on Wednesday, Instagram said that its service was back online. During the peak period of failure, which started around 12:50 pm EST, Facebook reported more than 100,000 failures and Instagram reported nearly 70,000 failures. As of 6: 00 pm EST, the number of reports from these two applications has dropped to more than 1,000. Downdetector data is based on reports submitted by users. The actual number of users affected may vary.

Market information: Israeli air strikes targeted the Palestinian people carrying security aid trucks in Rafah, causing medical casualties.The pumped storage capacity of State Grid in operation exceeds 40 million kilowatts. Today (12th), with the full commissioning of Zhen 'an Pumped Storage Power Station in Shaanxi Province, the installed capacity of pumped storage in operation of State Grid Corporation exceeded 40 million kilowatts, accounting for about 70% of the pumped storage power stations in operation in China. After 15 days of trial operation, Unit 4 of Shaanxi Zhen 'an Pumped Storage Power Station was successfully put into operation today, marking the full commissioning of the pumped storage power station.Seven people were killed in the attack on Rafah, a city in the southern Gaza. On the 12th local time, it was learned from the Palestinian side that Israeli troops bombed Rafah, a city in the southern Gaza, killing seven people and injuring many others. According to medical staff in Rafah, seven dead people were attacked while protecting a rescue truck that arrived in the city. (CCTV News)