Welcome to Aranya, in Beidaihe Qinhuangdao, a surreal gated community that has turned this remote stretch of coastline into an unlikely mecca for China’s fashionable gen Z. The area was once home to a failed property development but, over the last few years, it has been transformed into a showcase for China’s top young architects, boasting a menagerie of experimental galleries, cafes and meditative chapels, which attract more than 1.5 million visitors a year – all thanks to the powerful pull of social media...