India, April 10 -- (Bloomberg) -- Ship traffic through the Strait of Hormuz remained blocked Thursday, even as a handful of Chinese vessels lined up to escape, with a very fragile ceasefire between the US and Iran yet to improve traffic flows in the region. Just seven ships, all with some kind of prior link to Iran, were observed making the voyage out of the Persian Gulf on Wednesday. Normal transits in both directions are more like 135 a day. In a sign of Tehran's efforts to formalize control over the waterway, Iran's Ports and Maritime Organization published two safe routes for shipping, according to state media. It said the routes were necessary to avoid the potential presence of various anti-ship mines in the usual sailing routes throug...