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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.Medical staff: At least seven Palestinians were killed in Israeli air strikes. They were responsible for protecting aid trucks in the south of the Gaza Strip.Chief Financial Officer of Uber: "Very confident". At least in the first few quarters of 2025, the mobile business will grow at a rate of "10% to 20%".

Soochow securities: The demand resonance of land, sea and wind installations is optimistic about the long-term growth of the plate. soochow securities released a research report saying that in 2025, the growth rate of wind installations will be high, with long-term growth. Dongfang Cable (603606.SH) and Qifan Cable (605222.SH) are recommended, and Zhongtian Technology (600522.SH) and Hengtong Optoelectronics (600487. SH) are concerned; Daikin Heavy Industry (002487.SZ), Tianshun Wind Energy (002531.SZ), Haili Wind Energy (301155.SZ) and Taisheng Wind Energy (300129.SZ) are recommended.The Iraqi Foreign Minister talked with the French Foreign Minister to discuss the situation in Syria and combat extremism. On December 11th, local time, Iraqi Deputy Prime Minister and Foreign Minister Fuad Hussein talked with French Foreign Minister Barrow. During the call, the two sides agreed that the extremist organization "Islamic State" should be prevented from rebuilding its power. At the same time, the two countries should continue to carry out joint anti-terrorism operations in Syria and Iraq and continue to maintain cooperation in strengthening regional security and stability. The two foreign ministers discussed the security, military and political situation in Syria, and discussed the impact of the Syrian situation on Iraq and the region. The two sides stressed the need to promote the comprehensive political settlement of the Syrian issue led by the United Nations, ensure the full participation of all ethnic groups in Syria and safeguard their rights. The two sides agreed that in addition to communication with relevant countries and Syria's neighbors (including Turkey, Jordan, Lebanon and other Arab countries), Iraq and France should also continue bilateral coordination.Morgan Stanley downgraded Hikvision to equal rating, with a target price of RMB in 36 yuan. Andy Meng, an analyst at Morgan Stanley, was previously rated as over-matched. The target price is 36 yuan RMB, which is up by 14%.

Market information: Israeli air strikes targeted the Palestinian people carrying security aid trucks in Rafah, causing medical casualties.In response to Trump's tariff threat, the Canadian Prime Minister held another meeting with provincial governors. On December 11, local time, Canadian Prime Minister Trudeau held another meeting with provincial governors to discuss the tariff threat of US President-elect Trump. This is the second time that Trudeau has held a meeting with provincial governors since Trump threatened to impose a high tariff of 25% on Canada last month. It is also the first time that Trudeau has met with governors after having dinner with Trump at Haihu Manor. Trudeau said that if Trump really continues to impose a 25% tariff on all Canadian goods shipped to the United States, Canada is prepared to make some kind of response. The outside world believes that this statement means that Canada will impose retaliatory tariffs on some American goods. (CCTV News)In November, LP, a financial institution, injected nearly 30 billion yuan into private equity funds. Judging from the latest capital contribution of private equity funds, the reporter learned from Zhizhong Data Technology (Suzhou) Co., Ltd. that in November, the national private equity funds invested 486 pens, with a total capital contribution of 99.761 billion yuan. Judging from the contribution of LP (Limited Partner) with different identities, in November, government funds LP made a total of 178 contributions, with a total contribution of 39.9 billion yuan, accounting for 40%. LP, the industrial investor, contributed a total of 175 transactions, with a total investment of 13 billion yuan. The financial institution LP contributed a total of 29.948 billion yuan, of which the insurance institution LP contributed 16.488 billion yuan, accounting for 55%; Banking institution LP contributed 12.259 billion yuan, accounting for 41%. (Securities Daily)