A few weeks ago, the Iranian oil tanker burned and sunk. What was the back-haul for the ship?
https://www.theguardian.com/world/2018/jan/14/iranian-oil-tanker-sinks-off-china-no-hope-of-survivors
https://www.reuters.com/article/us-china-shipping-accident-japan/burning-iranian-oil-tanker-sinks-after-january-6-accident-chinese-state-tv-idUSKBN1F309G
sank. (fingers faster than the brain... :)