In Rare Legal Protest, Chinese Seek Boycott of Japan Goods By JOSEPH KAHN BEIJING, Saturday, April 9 - Several thousand young Chinese marched through Beijing's high-tech district on Saturday morning calling for a boycott of Japanese-made goods, a rare legal protest that underscored the sharp deterioration in relations between Asia's two most powerful countries. The mostly college-age Chinese, singing China's national anthem and shouting, "Support the Chinese motherland, boycott Japanese goods," appeared to number in the thousands, but there were no official estimates on Saturday morning. The police formed a cordon around the marchers and lined every street along the...