Congestion at China’s four main ports for log imports is creating delays of up to two weeks for handysize vessels. But the cause of the logjams is unclear.

Some shipowners blame Beijing, which last year reorganised all of the public ports in Jiangsu province into a single group.

Others cite a variety of issues, from the repurposing of reorganised ports to the state’s acquisition of bankrupt private facilities and an overall growth in the volumes of log imports.