Chinese Super League: What's behind all the spending?

The Chinese Super League football season kicks off on Friday. In just 14 years it has gone from minnow to major power in the world’s most popular sport.

Chinese clubs are offering top players as much as $730,000 (£600,000) a week, and that is leading stars to swap Europe and South America for Shanghai.

The BBC’s China correspondent Robin Brant explains what’s behind all the big spending.