The death toll from the two massive blasts in the Chinese port city of Tianjin has risen to 50, including 12 firefighters, while the cause is still unknown. The WSJ’s Menglin Huang has the latest. Photo: Reuters Subscribe to the WSJ channel here: http://bit.ly/14Q81Xy More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com Follow WSJ on Facebook: / wsjvideo Follow WSJ on Google+: https://plus.google.com/+wsj/posts Follow WSJ on Twitter: / wsjvideo Follow WSJ on Instagram: / wsj Follow WSJ on Pinterest: / wsj Don’t miss a WSJ video, subscribe here: http://bit.ly/14Q81Xy More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com Visit the WSJ Video Center: https://wsj.com/video On Facebook: / videos On Twitter: / wsj On Snapchat: https://on.wsj.com/2ratjSM