After the shortest trading day in China's 25-year stock trading history, the country's social media exploded with comments about the newly-introduced circuit breaks, with #A-sharescircuitbreaker trending on micro blogging platform Weibo, China's answer to Twitter.

Many investors were stumped: Gong Weili The Chinese stock markets already had a trading halt mechanism, so isn't the introduction of a circuit breaker superfluous? Chinese shares were already impotent and now we have the circuit breaker! I strongly request for the system to be dropped! Zheng Shusong The circuit breaker has cut off liquidity with no counter parties to trade with, best to drop it. Newworld Just half an hour after the market opening, it's the end of the day and traders can go home. The Chinese market just made history, again. Remember the 2015 stock crisis, remember the 2016 circuit breaker. This is what happens when the government tries to intervene the market. Long live the Chinese stock market!

Some saw the positive side: Mimixiushenghuoguan Does the circuit breaker have anything to do with the slump in A-shares? Although the circuit breaker doesn't serve a major purpose, the shares could have fallen by 9 to 10 percent now if not for it. The sell-off is caused by many situations that (the Chinese government) has not responded to. It's not the circuit breaker that's causing the selloff. So what's everyone complaining about?

Men look an electronic board showing stock information at a brokerage house in Beijing, China, January 5, 2016. Kim Kyung-Hoon | Reuters