China’s Ministry of Transport has summoned two maritime giants – Maersk and Mediterranean Shipping Company (MSC) – for talks on “international shipping operations” amid legal disputes over the Panama Canal, a vital artery for global trade. No further details were provided in the one-sentence statement, which was posted on the ministry’s website on Tuesday. But in China, government summons often serve as a warning and, if ignored, could lead to further action. The move came as mounting...