China's Shanghai circuit is the first event on the 2016 Formula 1 calendar where the cars' front end - and in particular the front left - is pushed hardest.
This means, after two races on stop/start tracks where drivers were limited by rear-tyre performance, tyre management is critical to keep the front left working while preventing the other more lightly-loaded tyres from graining.
Two very long straights and two big braking events means this track stresses the powertrain and brake set-up too.