It's less than five months away and the countdown clock is still ticking.

China's newly-minted Foreign Investment Law is set to take effect on January 1, 2020. Where did it come from? What does it say exactly? What changes will it bring? And what's been said about it?

This four-part series, rolled out in the days ahead, will have all your answers.

Part I: Gestation

Part II: Introduction

Part III: Comparison

Part IV: Reception