There is no way to know for sure ahead of time if a chin will like any one other chin. A lot comes down to personality, just like not every human likes every other human. Your best bet is to try to match personalities, submissive/submissive or submissive/dominate, dominate/dominate is unlikely to work.
Another thing you want to do when bringing a new chin into the house is quarantine it in another room away from your current chin for 30 days. This not only gives any illness time to show itself before exposing your current chin, but also gives the new chin time to settle in. It's best to get a good idea of how the new chin acts, eats, drinks, etc, before you add another chin into the mix which could cause the new guy to act differently. The month also gives you time to start establishing a bond with the new chin.
There are various ways to go about the intros and bonding process between the chins, but no one foolproof way. The way I've done it in the past was slowly move the cages closer over weeks until they are next to each other without fighting. I also gave them playtime together to get them use to each other. Other methods include putting both in a small carrier and going for a drive, the idea is that they bond over the "scary" car ride. You can also try cage swapping, put them in opposite cages (without the other chin) to get use to the scent of the other. Once you feel comfortable with them getting along outside the cage pick which cage you want them in and do a deep clean to remove all scent and rearrange and/or add new things so the cage is new to both.
If in the end they don't get along you need to be prepared to house them separately for their lives. Bonding can take anywhere from days to months, you can't rush it, chins go at their own pace. If at any point together (during intros or even years after bonding) they get to the point of drawing blood, that is a clear sign they aren't going to work. Chins can and do fight to the death, so once blood is drawn you can no longer trust that chin wont kill the other.