How nervous should the West be about China?

The vast nation is pouring money into Africa, taking over reefs in the disputed South China Sea, and engaging in a trade war with the US, raising Western concerns that a more assertive China could alter the power balance on the world stage.

BBC World Affairs Editor John Simpson has been reporting from China for 30 years. He returns to find fashion shoots, a driverless bus, and growing authoritarianism, as he explores whether China is a friend, foe or rival of Western countries.