A link to a wikipedia article about the list of the worlds top supercomputers (the near majority of which are in China and presumably used by the CCP) doesn't mean that strong, well-applied crypto can be broken (I assume you're referring to brute force breaking). Mathematically, the computing power, energy and time necessary to break it are known in relation to all current computing power and, more importantly, methodology. Thus, taking just one of the Chinese supercomputers from the top500 list, the Tianhe-2, the calculation for that particular machine, working alone, to break just half the keyspace of AES 256 doesn't lend credibility to your claim:
=33 860 000 000 000 000 keys per second (33.86 quadrilion)
3.386e16 * 31556952 seconds in a year
2255 possible keys
2^255 / 1.0685184e24
=1.0685184e24 keys per year (~1 septillion, 1 yottaflop)
=5.4183479e52 years
Needless to say, that's a long fucking time. Yes, cracking an access password would be much less time-consuming and so would finding and using non-brute force attack methods to guess or steal the key but for your basic claim that "Yes", China has cracked strong encryption, I just don't see where you get that idea from.
