If you are looking for expert comment on trading suspended on the Chinese stock market then here is Kamel Mellahi, of Warwick Business School, who is a Professor of Strategic Management and researches business in China.
Professor Kamel Mellahi said: "The efficacy of the circuit breaker is questionable in a highly volatile environment driven by a herd mentality. It does not seem to be having the expected effect. It looks like it’s generating more panic rather than a pause for reflection and objective assessment.