The military leaders have been tested, Pentagon spokesman Jonathan Hoffman said in a statement. None have exhibited symptoms so far or have tested positive.
The minister unveiled the three-day Brunei Halal Showcase on Wednesday to nurture local Halal business.
The ministry has urged provincial commerce departments to improve working mechanisms to better deal with foreign companies' complaints, and promptly respond to and address problems.
The meeting stressed expanding testing to cover all key areas and key populations while tightening control of movement in affected communities, launching rigorous screening and enforcing centralized quarantine of all confirmed cases and their close contacts, suspected cases as well as people with fever.
The ministry said it would launch a thorough investigation into the incident, an unidentified division director of the ministry told China Central Television on Wednesday. Results will be made public, and anyone found with misconduct will be punished, the TV report said.
The ministries of finance and emergency management have allocated 5.24 billion yuan (0 million) to ensure a warm winter for people affected by natural disasters.
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The mini-program will also provide methods and solutions of doing experiments, and information of diseases, gene, immunotherapy and scientific instruments.
The ministry will also speed up efforts to hasten the development of 5G hardware, including smartphones, he said.
The ministry said middle and short-distance trips around cities were the primary travel choice for most Chinese people during the holiday, which started on Saturday.
The ministry will also take measures to encourage the establishment of a number of bases for green agricultural production, including green grain and livestock farms, he said.