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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.The latest 24-hour situation tracking of the Russian-Ukrainian conflict (December 12) The conflict situation: 1. The French President considers deploying a European peacekeeping force in Ukraine. 2. Uzbekistan claims that the city of Zaporoge was attacked by Russian troops, resulting in 6 deaths and 22 injuries. The Ukrainian military said it attacked the oil depot in the Bryansk region of Russia. 4. Russian Ministry of Defence: Russian air defense forces destroyed 14 Ukrainian drones overnight. 5. Russian Ministry of Foreign Affairs: On December 10th, Ukraine attacked the car in which the experts of the International Atomic Energy Agency were riding, and the attack occurred near the nuclear power plant controlled by Ukraine. 6. Russian media: The Russian side said that it was attacked by six ATACMS missiles today. Russia said it would respond to today's ATACMS missile attack. 7. Governor of Belgorod, Russia: Ukrainian troops fired more than 30 shells in Belgorod within 24 hours, causing no casualties or property losses. 8. US officials: Russia may launch another experimental "Oreshnik" missile to Ukraine in the next few days. The United States focuses on providing Ukraine with an air defense system to defend against Russian missiles and drones. Others: 1. Polish Prime Minister Tusk: He will visit Ukraine in early 2025. 2. Hungarian Prime Minister: Zelensky categorically rejected the ceasefire on December 25th. 3. German Chancellor Scholz: The Ukrainian energy sector needs a lot of private investment. 4. Sources: NATO may raise its expenditure target to as high as 3% of GDP. 5. Diplomat: The EU envoy failed to reach an agreement on the 15th round of sanctions against Russia. 6. Ukrainian Finance Minister: Ukraine can resist at least until the middle of next year without American assistance. 7. US Treasury Secretary Yellen: US sanctions against Russia "continue to tighten" and have tried to curb Russian income through innovative ways. 8. Russian Ministry of Foreign Affairs: The relationship with the United States is in jeopardy, calling on Russian citizens not to travel to the United States. Russia has asked the United States to agree to appoint a new ambassador to the United States. 9. Two sources: Ukrainian President Zelensky used his first meeting with Donald Trump since the US presidential election to show that Ukraine needs security guarantees in any negotiations to end the Russian-Ukrainian conflict.The Palestinian Islamic Jihad (Jehad) said that a delegation, including its leaders, arrived in Cairo on Wednesday to discuss the negotiation of the hostage-for-prisoner agreement.

Front page of securities daily: vigorously boosting consumption is the focus of current macro policy. The front page article of securities daily points out that consumption is the ballast stone for stable economic operation. In recent years, China has issued a series of policies to promote consumption, which has brought vitality to the consumer market; The rapid development of some emerging consumption patterns has brought new growth points to the consumer market. However, we must also see that residents' consumer confidence still needs to be enhanced. Therefore, it is necessary to take multiple measures simultaneously, constantly consolidate the foundation of consumption growth, enhance residents' willingness and ability to consume, and promote the sustained recovery of the consumer market. First, increase residents' income through multiple channels and improve their spending power. Income is the primary factor that determines consumption. With income, residents have the confidence to spend. Therefore, on the one hand, it is necessary to increase residents' property income through multiple channels and enhance residents' consumption ability and willingness; On the other hand, it is necessary to increase support for key groups and enhance the overall consumption capacity. Second, further support the trade-in of consumer goods. Third, promote the upgrading and expansion of service consumption.Ferrous lithium phosphate has strong demand, so it is hard to hide the embarrassment of "meager profit" because the orders of enterprises are full. In December, the Ferrous lithium phosphate market continued to heat up, and most enterprises had full orders. However, contrary to the fiery market, it is still difficult for most enterprises to reverse the "meager profit" situation. "From the market situation, the growth in demand for new energy vehicles and energy storage markets has promoted the warming of the Ferrous lithium phosphate market. Most Ferrous lithium phosphate enterprises are affected by factors such as rising raw material prices, weak bargaining power of products and fierce competition in the industry, resulting in pressure on profits. " Yu Xiaoming, a senior investment consultant of Shaanxi Jufeng Investment Information Co., Ltd., said that in the long run, with the technological progress and market expansion, the profitability of Ferrous lithium phosphate enterprises is expected to improve. (Securities Daily)Morgan Stanley upgraded the rating of Jingao Technology to over-allocation, with a target price of RMB 27.36. Tongwei shares will be upgraded to overweight with a target price of RMB 39.53.

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.Trump's NASA candidate called his future SpaceX mission a "question mark". On Wednesday, Jared Isaacman, a billionaire in science and technology, who was selected by President-elect Trump, said that his planned private astronaut mission with Musk's SpaceX company "is still a question mark and may be put on hold for the time being" because he is going to enter the government department to lead NASA.