Why do you always hang floats or rings in rod-throwing fishing?

The reason why rod-throwing fish is always floating or splayed is:

1, the lead drop is too light, at least 30 grams.

2. If it is a string hook, the lead pendant must be at the bottom of the hook, unlike traditional fishing in Taiwan Province, where the lead pendant is between the hook and the drift.

3, the hook is always floating, and another reason is that the hook line is too long and too soft.