Ural 650 Episode: 19
Supposed to be the same. Ural 650. Some scenes were filmed in China, not a Chang Jiang?
No, this scene was most probably filmed in Russia.
Ural IMZ-8.903 Patrol Episode: 19
Possibly the same: http://www.retrogarag.ru/retro/motocikly/?gallery=630
Ural 650, these Police bikes were formally known as IMZ-8.903.
Ural M-72 Episode: 19
Possibly the same: http://www.retrogarag.ru/retro/motocikly/?gallery=698 2 points to note :- M-72's were never known as Urals or Dneprs, it's just M-72 without a brand/manufacturer name. A lot of this was filmed in China (what is the location for this scene?) This is possibly a Chang Jiang CJ 750, Soviet production ended in 1957, this one looks very bright & shiny......... Filmed in Russia, judging by the area and other vehicles (even background Lada with a modern Russian plate is here). Set in Russia too. Not a lot, I'd say. Mostly interior scenes. But some Russian exteriors were filmed in China. /vehicle_1156792-Shanghai-SH-760-A-1974.html
I'm leaning towards CJ for a couple of reasons - Soviet production lasted 17 years and ended in 1957, PRC production is rumoured to be over 40 years from '58 onwards. You can still buy them "new" although this is more likely to be the PLA releasing huge numbers of military reserve vehicles that have been in storage unused for decades, there are millions of them out there. It just looks too new, it's either a recent restoration or to my mind, an ex PLA new-old stock bike that has been recommissioned.