CCP's Little Pinko army likes to make fun of the Indian military, including their subs, and yet it appears the PLAN has just as many if not more accidents, including several huge fatal catastrophes. CCP, of course, tries to cover everything up, so as far as we know they may have suffered even more mishaps. Both India and China got a lot of their subs and sub tech from Soviet Union/Russia (the Kilo isn't a bad sub), and Russian designs often have defects--the same pattern is happening with the Su27/30/33 family that China copied and turned into J11, J15, and J16. PLAAF also bought some Su35s, but so far we don't know if they've managed to copy those as well (they may not have succeeded, but it won't be for lack of trying). At ;east India also uses less problematic Western systems (Germany, France, etc.), which China can't get these days because of sanctions and recognition that CCP is a troublemaking regime--all they can do is to steal designs through espionage and bribery.
2023, Type 035 Submarine 631? And then Type 053? Who prepared the script for you? Who prepared the script for you ? In 2003 the 361 sub's crews were all killed in an accident, so you needed to move it to 2023 and switch the number sequence? From that point on I have to wonder about the authenticity of this video of yours. Half-truths are the best bluffs.