For years, Chinese fishermen trawling for fish, shrimp and crab have played cat and mouse with Taiwanese authorities as they closely track boats that near the median line of the Taiwan Strait. MEDIAN LINEOn Saturday, Taipei said more than 40 Chinese planes crossed the Taiwan Strait's "median line", which Beijing does not recognise. Deteriorating relations have made Chinese fishermen more afraid of approaching the line. Several times last year, Taiwan's coast guard detained Chinese fishing crew members, citing illegal trawling, according to official statements. ($1 = 6.8681 Chinese yuan renminbi)Reporting by Josh Arslan and Thomas Peter; Writing by Ella Cao and Ryan Woo.

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