I promise to hold on to my passion for defending clients

Liu Wenyuan, 77, a criminal lawyer at the Shangquan Law Firm in Beijing, was one of the first people to graduate in law after the founding of the People's Republic of China.

Most people my age look after grandchildren every day, but I don't want to leave my job.

I have not accepted any new cases since 2014, but some remain unresolved, so I come to the office every day to study criminal law and advise my colleagues.