What size hook is suitable for fishing crucian carp?

In the past fishing process, I found that some anglers who use the platform fishing method have strict choice of hooks, while some anglers who play traditional fishing often use big hooks regardless of the fish situation, so it is easy to miss the existing fish. Of course, I didn't belittle traditional fishing, but promoted Taiwan Province fishing. I just wanted to show that if the hook is chosen correctly, it can help us to fish to a great extent, so today I will tell fishermen who are good at fishing about the hook.

Some older traditional fishing enthusiasts made a mistake when choosing a hook, in fact, they were pursuing the psychological mischief of "big fish and big hook". This is not unreasonable, but it also affects the catch. It is often seen that an old man sticks crucian carp with a hook of no.5 or more in a wild fishing place, and the catch can be imagined.