Can the main line be hooked directly without using the auxiliary line?

Yes, my traditional fishing line group is a line to the end, and there is no separation.

There are space beans and floating seats on it, and then two lead pendants are hung on it, and the fish hooks are tied directly under it. The neater the line group, the less things on it, and the higher the sensitivity. Of course, there is a risk of drifting away after tangent, but if you are fishing for crucian carp, there should be nothing to worry about.