Hong Kong: British consulate employee Simon Cheng detained in China
https://edition-m.cnn.com/2019/08/21/asia/hong-kong-simon-cheng-intl-hnk/index.html?r=https%3A%2F%2Fedition.cnn.com%2F
I guess China trys to use the consulate employee as hostage to show power on Hong Kong amid anti-extradition law movement. It's often the case with Mainland China to detain someone who made trivial crime for political purpose like crackdown on anti-government movement.