Most of their weapons are copied from Russian or American plans. During the Korean war their weapons were copied from WW II Russian plans, most notably the PPSh 41 sub machine guns and later the PPS 43 submachine guns, and the 75 mm recoilless rifle which was a copy of the U.S. recoilless rifle. The few radios that were captured by U.S. forces during the Korean war were Russian made sets such as the 10 RT used in tanks. In the post Korean war era, they copied the Russian SKS, AK-47 and RPD Light Machine guns. These were copied in 1956 and Chinese AK-47s are properly called Type 56 assault rifle, etc.
Chinese tanks are simply copies of Russian tanks.
As was pointed out in the CIA article, the Russian's have not supplied them with high speed keying equipment, burst encoders, etc. Several Chinese radios have been made for tanks and one was discussed in a prior series on the Radios of Desert Storm. This however is beyond the scope of this short brochure. The first observation that one can make is that the Viet Minh and later the NVA and VC were strongly influenced by what they saw of the W.W.II Japanese Signal Service. The Japanese had signal units that were triangular with a telephone section, a radio section, and a messenger section.