How well did you keep up with the news this week? Take our [quiz](//ig.ft.com/quiz/firstft-2021-10-15/) . LinkedIn is [closing down](//www.ft.com/content/bf56e388-f2c5-4686-90c0-b995529ce63f) its social networking site in China, marking the departure of the last major US social media company from the country. The Microsoft-owned company announced yesterday that it was closing down the localised version of its popular networking website after “facing a significantly more challenging operating environment and greater compliance requirements in China”. The move comes after LinkedIn was called in by China’s internet regulator in March and ordered to clean up its online content. In the same month, LinkedIn said it...