ON this day 25 years ago: a mob of about 80 troublemakers from Chinese territory stormed across the border at Lowu to start an unruly and noisy demonstration. They were, however, dispersed with tear gas when they ignored warnings to leave. It was the second successive day in which unruly elements from the Chinese side of the border, mostly farmers, had created incidents at the border. Before returning to the mainland they pulled down the Union Jack on the British side of Lowu bridge. They wrote slogans on the walls at Lowu railway station, defaced a railway engine and even pulled down a portrait of the Queen, smashing and hacking it with their hoes. Meanwhile, leftists intensified their nuisance campaign in many parts of Hongkong and Kowloon, demanding reinstatement. The trouble on the border started on May 29 when 20 to 25 women farmers from the Chinese side went to the police station at Lowu railway station complaining that while working in the fields they had been subjected to a tear gas attack. Later, a group of unarmed Chinese militiamen cut the wire fence and intruded into Hongkong to join force with the farmers. ABOUT 1,000 striking bus workers slowed down the bus services at the Kowloon Star Ferry by lining up and slowly boarding every bus during the evening rush hour, apparently adopting new tactics in their efforts for reinstatement. The workers boarded the buses slowly, deliberately disrupting the bus schedules. When a bus left, the workers got off at the first stop, walked back to the terminal and queued up again. It was learned that the workers used the same nuisance tactics at all the Kowloon Motor Bus terminals and at several section stops. Most of the people involved were dismissed workers but their relatives and employees of left-wing stores also participated.