It’s 9 a.m. on a typical morning in Chengdu and I’m awakened by the sound of my phone alarm. The phone is in my study, connected to my bedroom by sliding doors. I turn off the alarm, pick up my phone, and, like millions of people in China, the first thing I do is check my WeChat. At 9:07, I send my first message of the day.

Before 10 on a normal day in Chengdu, WeChat knows the following things about me: It knows roughly when I wake up, it knows who has messaged me and who I message, it knows what we talk about. It knows my bank details, it knows my address and it knows my coffee preference in the morning. It knows my biometric information; it knows the very contours of my face.