After Zhang Yang got Xiaobao's fishing rod, he first pulled the bobber about 50 centimeters down the line and cast it into the water to observe the changes.
This step is actually very important in the eyes of experienced anglers. Many people talk about testing the float, and this is the action they mean.
Pull the fishing rig all into the water, then observe the bobber's position when it's between the water's surface and the bottom.
Many novice anglers are quite casual about adjusting the float. Sometimes they adjust it to a 10-unit setting, but during testing, it shows 7 units, yet they still prepare to fish with 10 units.
Someone who doesn't understand might ask, "Does a 3-unit difference really make a noticeable impact? Is it a big deal?"
For casual wild fishing, it's indeed not a big deal, but in a competitive environment, that 3-unit gap is huge.
