Chu Mingcheng's primary target fish for this trip to Xisha were deep sea fish, which resided at depths of at least eighty meters, mostly between one hundred to one hundred fifty meters, and he would use the bottom fishing method.
This fishing method involves using the weight of a lead sinker to rapidly submerge the bait hook to the seabed, and then, by utilizing the length of the branch line and the action of ocean currents, allow the bait to drift near the sea floor.
The length of the branch line is generally between 2 to 4 meters, and the lead sinker is about 5 to 10 kilograms.
Even if the deep sea fish weighed only a few kilograms, it would be challenging to reel them in with manpower alone, which is why Fishing Man uses electric fishing reels for deep sea fishing.