Beijing steps up its crackdown on Hong Kong, reaching behind closed doors to silence people’s private conversations, even their very thoughts. As the scope of the law becomes clear, a mother makes a difficult decision. Get 30 days' free access to The Telegraph: https://www.telegraph.co.uk/silenced |Read more from Sophia Yan: https://www.telegraph.co.uk/authors/s/sk-so/sophia-yan/ |Read more from Nicola Smith: https://www.telegraph.co.uk/authors/n/nf-nj/nicola-smith/ |Read more of The Telegraph's coverage of Hong Kong: https://www.telegraph.co.uk/hong-kong/ |See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.