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These groups include the National University of Defense Technology, which is on the Entity List, and the China Air to Air Missile Research Institute in Luoyang, which develops long-range, high-precision missiles.

In a brochure promoting debt sold by Luoyang Gaoxin Industrial Group, little was mentioned about the issuers' financial health.

The central city of Luoyang installed sensors on the doors of residents quarantining at home, in order to notify officials if they were opened.

Cities such as Luoyang in the central China and Jieyang in the south said on Sunday travellers need to report to communities, employers or hotels their trips three days ahead of arrival.

Luoyang, a city of 7 million, has closed various entertainment venues, including cinemas.