Who can tell me the strategy for matching the troops in the Bunker in StarCraft 2?

You'd better understand the bunker from another perspective.

As a defensive building, it is different from z and p in that it requires additional resources and population to function.

So think of it as a support point that can provide extra life for soldiers.

Generally speaking, it is enough to add spearmen (considering our previous positioning of it)

Bald soldiers, plunderers and even ghost soldiers have more room for operation and output It doesn't have any advantage on the ground, so it's a waste to put it in the bunker.

And as mentioned above, this thing is only a defensive building in the middle and early stages, so 4 Lancers are recommended.

If it is offensive and suppressive, it may not necessarily serve as a strategic support point. However, generally bunker suppression only targets the enemy's second mine, so it will only be spearmen. The only exception is that you can use the bunker as a shelter to recuperate when being harassed by predators, but I guess that's not the original intention of you asking this question.