Hong Kong pro-democracy tycoon Jimmy Lai has been charged under a Beijing-backed law critics say has been used to crack down on dissent.

A Hong Kong court heard final arguments Monday in the landmark national security trial of former pro-democracy newspaper founder Jimmy Lai, who could be sentenced to up to life in prison if convicted.

By Jessie Pang and James Pomfret HONG KONG (Reuters) -Hong Kong pro-democracy media tycoon Jimmy Lai was given medication and a heart monitor on Monday for the start of final submissions in a landmark national security trial after concerns over his health delayed proceedings last week.