How thick is the drift used in the main line of traditional fishing?

It depends on how you fish. If you want to catch a slow fish, then a small drift will increase lead, while a fishing spirit or even a fishing drift will increase lead. The line and hook will depend on the size of the fish you want to catch. My biggest line is No.5 hook+1.5, the heaviest one has caught about 5 kg of wild carp, and the smallest one is No.6+No.3 Izu, which catches crucian carp in winter. I use a seven-star float with plastic pipes and an Izu hook, both of which are fish essence.