Is it better to run lead or set lead when fishing in the river?

Personally, I think it depends on the fish, not the fishing point. Small fish can run lead fishing for a long time, but not for a long time, especially for wild fishing. Lead fishing means that lead falls to the bottom of the water. At present, it is possible to adjust four catches and two catches (one drag and one touch, or two baits to the end or two baits to the end), and the bait cannot be pressed down. There may be the following situations: 1. The double bait has bottomed out and can be adjusted appropriately. Personal experience has dead lead, that is, fixed lead, please advise!