Nanjing Radio Factory, Nanjing 南京无线电厂 traditional 南京無線電廠:

Nánjīng 南京 was (also) called Nanking (the capitol city of the south) Nanjing is the capital of Jiangsu province and is with 6 Million (city) or 8 Million persons the second largest City behind Shanghai in East China.

Brands:
Hongxing 红星 (Red Star)

Nanjing Radio Factory (if taken the true translation) produced military products as a core factory of Central Wireless Electronic Factory. In 1952, then still named Nnjing Electro Factory 南京电工厂, sent some engineers to the USA to get a start with an American product into radio manufacturing. They could then assemble the Philco 46-806, a radio for the tropics. Soon they sold it as Hongxing 红星 501 which is in English "Red Star". But there was not a greater production.

The follower was Hongxing 红星 502 in 1953. Also in 1953 they produced the first radio tubes, see separate history about it.