Six Taiwanese coast guard vessels embarked on a patrol of the Taiwan Strait Wednesday at the launch of a new campaign to crack down against Chinese fishing boats illegally straying into the Taiwan side of the strait to fish. It was the beginning of a reinforced effort by the Coastal Patrol Directorate General (CPDG) to raid intruding Chinese fishing boats - a problem that arose after China lifted its 30-month ban against fishing in the strait on Aug. 1. Freed from the ban, Chinese fishing vessels are expected to stray into Taiwan- controlled water, CPDG Deputy General Director Lin Hsing-heng said at a ceremony Wednesday in Makong City in the Penghu archipelago off southwestern Taiwan, to mark the launch of the patrols. Already, Taiwanese coast guards discovered many Chinese boats illegally sailing in the waters close to the Penghu archipelago on Tuesday, fishing wantonly, according to Lin. Lin said many Chinese fishing boats spotted in the past use lethal drift gill nets; trinal nets, which have three parts; and rolling-wheel nets for fishing. This way of fishing damages the marine ecology and depletes marine resources, Lin said. 