Media mogul Jimmy Lai was fearless and “led by example” after the Beijing-enacted security law came into force, an activist testifying against the tycoon in his high-profile trial has said. Chan Tsz-wah, a paralegal who was charged alongside Lai and is now a witness for the prosecution, appeared at West Kowloon Law Courts Building on Thursday as the defence began questioning him. Marc Corlett, one of Lai’s lawyers, asked Chan whether it had been his “intention… to deliberately take action [he] knew to be in breach” of the national security law. The activist said it “depended on what kind of pe…