What line combination is the best for fishing in polyculture fish ponds?

For fishing in polyculture ponds, according to the hardness of the fishing rod and the size of the individual fish, choose the appropriate line group: \x0d\ 1, the fishing rod is soft and the individual fish is less than 3 kg. You can choose 1.2 main line with 0.8 sub-line. \x0d\2。 The fishing rod is soft, and the single fish is under 6 kg. 1.0 sub-line can select 1.5 sub-line. \x0d\3。 The fishing rod is relatively hard, and a single fish is under 3 kg. 1.2 sub-line can select 1.5 sub-line. \x0d\4。 The fishing rod is relatively hard, and the single fish is under 6 kg. Sub-line 2.0 can be used to select sub-line 2.5.