“The scientists and engineers at a sharashka were prisoners picked from various camps and prisons and assigned to work on scientific and technological problems for the state.” - https://en.m.wikipedia.org/wiki/Sharashka
“Well-fed and well-clothed but supervised by Party and police functionaries with little knowledge of aviation, Tupolev and his team of 150 specialists worked under the threat of harsh reprisal for the least setback.” - https://www.amazon.com/Stalins-Aviation-Gulag-Memoir-Tupolev...
While more than half the Chinese friends I made during grad school in the US after completing their PhD's or after getting work experience have returned home.
The results speak for themselves in the kind of companies the two countries have produced. There is no comparison between how Russia and China have treated their talent.