If there's one thing executives at Honda Motor and Nissan Motor need to fix first when - and if - they merge, it's their China business. The Japanese duo's sales have been falling for years in the world's largest car market.

Nissan was deep in the trenches, with its existence at stake, but Honda's timely entry gave it a positive direction. Here's how everything went down.

Despite reports that Mitsubishi would not be a part of the Honda-Nissan merger, officially no decision has been made