Some new information and an artist rendering of a 128.6 m (424 ft), 5,418 ton, 20.4 knot cutter to be delivered to the Maritime Safety Administration (MSA) in May of 2012. (Most of the recent construction has been for the Chinese Maritime Surveillance (CMS).)
The post also includes a link to an August 2010 post that explains the five different agencies that perform Chinese maritime law enforcement.
Chuck Hill's CG Blog 
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Some fairly good photos of the ship that is currently the largest Chinese cutter (smaller than the ship referred to above):http://china-defense.blogspot.com/2011/06/singapore-is-play-host-to-chinas-msa31.html