The first ship was under a port state control inspection in Qingdao China when the Chinese Maritime Safety Administration (MSA) verified the use of fuel oil with a sulphur content of .6777% mm.
The second ship was berthed in Xiamen when the MSA cited her with burning non-compliant fuel. The ship had been at berth nearly six days after changing over to compliant fuel. However, it is likely that previous high sulphur fuel residue remained in the engine fuel system resulting in emissions over the China ECA limit. The ship was ordered to take effective measures to purify the fuel system.