Why can't the yellow dot of the Dragon-Ball Integration Plan go up?

Yellow represents aliens. Find the enemy of the corresponding color, first beat the captives (the stars under the blood bar represent capture) to the residual blood, and then kill them with the skill of "full opening XXX", and you can successfully capture them. This can raise the upper limit of the yellow energy point. It should be noted that the enemy captain is an alien, and his players are not necessarily, so if you need to collect energy of a certain color, you must know what race that person is.