Hong Kong pro-democracy businessman Jimmy Lai, 77, appeared in court for the start of his final submissions in a national security trial after experiencing heart palpitations. Lai, founder of the closed Apple Daily, faces charges of colluding with foreign forces and publishing seditious material, which he denies. Reuters reported.

He was provided medication and a heart monitor, with a medical expert confirming he is fit for court. Supporters expressed concern over his health after nearly 1,700 days in solitary confinement.

According to Reuters, western governments, including the US and Australia, have called for his release and criticized Hong Kong’s national security laws, while authorities insist Lai is receiving a fair trial.