“Why has Beihai, a city of 572,000 – or 1.5 million if we include the surrounding area – seen 58,000 arrests for pyramid selling alone since 2014, equivalent to either four or 10 per cent of the whole population? This coastal city is calculated to be the fastest growing city in China, possibly in the whole world. There is no other Chinese city ranked in the world’s 50 fastest growing up to 2020.”