What is so great about BC? And why are the Chinese getting behind this coin?
You are a little bit lazy. Here you have an answer from our reddit by btclaw
http://www.reddit.com/r/blackcoin/comments/2eyyi1/what_makes_blackcoin_or_any_altcoin_better_or/Speed. Bitcoin is slow, taking at least 10 minutes per block and sometimes, much, much longer. Blackcoin has blocks in less than a minute. Blackcoins speed makes it more practical to use and preferred for applications like BlackHalo.
Proof of Stake. Bitcoin is difficult to mine. More and more computing power goes to mine it, causing a high cost of mining and high carbon footprint. Blackcoin is Proof of Stake and not "mined". You will earn 1% annual interest by staking Blackcoin, which also helps secure its network. That also makes Blackcoin a good altcoin "savings bond".
Security. Bitcoin is vulnerable to attacks by those who control 51% of the mining power. This potential is already possible due to mining pools. Blackcoin is not susceptible to this attack because it is not mined. Proof of Stake 2.0 is far more secure, requiring someone with 51% of the coins to make a similar attack, and coin age issues addressed by Proof of Stake 2.0 dilute the effectiveness of such an attack as well. I like asdffsdf's points on how that someone who purchased 51% of the existing Blackcoins has far less incentive to ruin the network.
Other Issues. I enjoy Blackcoin's community and active developers. Blackwave Labs, for example, created BlackBit, an open source and improved version of VeriBit that allows Blackcoin to be used where Bitcoin is used. I'm looking forward to BlackHalo and using my bc to use for the required escrows (thanks dzimbeck!). I also use Coinkite, the first major exchange/point of sale service that picked up Blackcoin. Blackcoin was the first coin to use the multipool concept for mining other coins and paying the miners in Blackcoin, creating constant buy pressure.
I don't see Bitcoin being able to fix its major flaws. I see Blackcoin as Bitcoin 2.0.
We could need more info-memes explaining this to the lazy, short attention guys. Unfortunately I am no graphics designer.