Can I use 2.0 for the main line of 7.2 pole for wild fishing of crucian carp in winter?

The main line of wild crucian carp fishing in winter is 7.2 pole, and 2.0 can be used for fishing. If there is a black hole, this combination has no problem fishing carp in spring, and the main line in the later period is 1.5. I am fishing for crucian carp in the wild, the main line is No.2-3, and the secondary line is 1.2- 1.5, mainly considering carp. There must be a lot of people fishing for crucian carp, and you must not panic when you meet crucian carp. 10 kg is not in a hurry. Only when playing games, fishermen in fish ponds will think of using the main line of 0.8 and the sub-line of 0.4-0.5. You must be dumbfounded when you go to Yehe. Your pole is softer than noodles.