Kathleen Magramo |CNN – Jailed media tycoon Jimmy Lai faces his biggest trial yet. Hong Kong media tycoon Jimmy Lai, known for his support of the city’s pro-democracy movement and criticism of China’s leaders, turned 76 behind bars in a maximum-security prison earlier this month. Prosecutors allege that articles published by Lai’s Apple Daily newspaper violated Hong Kong’s national security law by calling for overseas sanctions against the city’s leaders. Beijing imposed the national security law in the wake of the 2019 protests, arguing it has “restored stability” and closed loopholes that allowed “foreign forces” to undermine China. Critics say it has decimated Hong Kong’s freedoms and transformed the city’s legal landscape.