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Citigroup's chief financial officer said that the spending of American consumers in its branded credit card business between Thanksgiving and Cyber Monday increased by a median digit year-on-year.The main contract of alumina fell more than 2.00% in the day, and it is now reported at 5130 yuan/ton.China and Vietnam announced the signing of an intergovernmental agreement on cross-border standard-gauge railway cooperation projects. On December 10th, the 16th meeting of the China-Vietnam Bilateral Cooperation Steering Committee was held in Beijing. The two sides agreed to give full play to the overall coordinating role of the Steering Committee, actively explore the direction and measures to deepen the building of a community of destiny between China and Vietnam around the implementation of the high-level consensus between the two parties and the two countries, and promote more results. The two sides announced the signing of an intergovernmental agreement on cross-border standard-gauge railway cooperation projects. The meeting also heard a report on the first meeting of the "3+3" strategic dialogue mechanism between China and Vietnam in diplomacy, national defense and public security.

The US military temporarily grounded the Osprey again. The US Marine Corps, Navy and Air Force confirmed to the media on December 9 that for security reasons, the US military has temporarily grounded the Osprey tilt-rotor transport aircraft again on a global scale. In the past five years, there have been frequent accidents of Osprey transport aircraft in various places, and the safety of Osprey has been questioned.Nasdaq China Golden Dragon Index fell to 4%, Nasdaq China Golden Dragon Index fell to 4%, and China ETF fell more than 12% when it tripled its wealth. Fangduoduo fell more than 20%, Tiger Securities fell nearly 12%, Billie Billie fell more than 10%, Netease, Baidu and Pinduoduo fell more than 4%.Prosus, the major shareholder of Tencent, repurchased 126.4 million euros of shares from December 2 to December 6.

Norwegian Natural Gas Company: From December 11th to December 12th, Colesnes Natural Gas Treatment Plant stopped production 6 million cubic meters/day.Delong Laser: There is no robot-related business at present. Delong Laser (688170) said on the interactive platform on December 10th that the company has no robot-related business at present. The company's products use machine vision technology to realize functions including positioning, defect handling and size detection.China Haiphong: The car-gauge resolver decoder chip achieved a technical breakthrough and actively laid out the automobile chip industry. On December 10th, China Haiphong responded to the questions about the company's car-gauge resolver decoder chip products on the investor interaction platform. China Haiphong said that in order to solve the technical problems of the core chip, the company's subsidiaries carried out independent research and development work for the car-level resolver decoding chip, which broke through a number of key technologies. The company's car-level resolver decoding chip successfully passed the AEC-Q100 car-level reliability and quality assurance system certification, successfully filled the domestic gap and realized the independent control of the core components of the electric drive system.