Well the best way is not to store in exchanges but sometimes we need to trade there and we should risk our btc by sending there, but bter is good i think these days as i traded few times there.
I guess you missed an opportunity to have your funds locked at Bter for 3 weeks a year ago, even if they hadn't been affected by the theft of 7,000+ bitcoins back then (e.g. dogecoins)
Who said that i have not stucked funds there? I have several bitcoins there stucked maybe more than you who tell me about bter, but whatever happened in the past i have made many trades recently there and it's working.