What is the most important factor when you change jobs?

I'm asking this question because I'm thinking about changing jobs, and I'd like to know if my seniors have any good advice for me.

Being a software engineer working in China, maybe this question may be thought from a very different perspective for most people here. Because in China we may face the question of whether to choose something like 996 (working from 9am to 9pm, 6 days a week) in exchange for a higher salary. I think this is something that is probably rare elsewhere. The question amounts to how important is money when changing jobs. For reference, if I chose 996, I would probably get twice the pay.

Of course, I'd like to know all of your thoughts, so feel free to chime in!