When adjusting the drift, regardless of whether the tip of the drift is hollow or solid, is to adjust the sign of the rod all out of the water, because the weight of a bait can pull the tip of the drift invisible, two bait positioning after the tip of the drift as long as the surface of the water is exposed, is a couple of eyes on the fishing a few eyes, often fishing 3 eyes as much.

The bluegill is a species in the carp family of the order Carpiformes in the order Spoke-finned Fish, also known as green carp, wuqing, snail green, black carp, wuqi, black mackerel, wu mackerel, copper green, green stick, five Houqing, etc., known as wuyao or wuzhai in Taiwan. It is one of the four major fish in China.

In Anhui Province, commonly known as "wu ming", "black ming" or "snail ming", because of its black body, preferring to eat snails and so named; common in northeastern China. The "mackerel" is not mackerel, it should be written as "mackerel", which is a kind of deep-sea fish. In China, the largest specimen of mackerel weighing 218 pounds, was caught in 2005 in Jinniu Lake, Liuhe District, Nanjing, 1.86 meters long, weighing 218 pounds, identified by the scales of about forty years old.

The bluegill is also known as black carp, snail green. Scleractinia, carp family. Body subcylindrical, body length up to more than 1m. Greenish black, fins gray-black. The head is broad and flat, the mouth end position, beardless. Pharyngeal cephalic teeth molar-like. It inhabits the lower and middle layers of the river and feeds on snails, mussels, shrimps and aquatic insects. 4-5 years old, it is sexually mature and spawns in the upper reaches of the river, and can be artificially reproduced. It is a large, fast-growing fish, with the largest individual reaching 70kg, and its meat is very tasty. It is the main freshwater fish culture object in China. Distributed in China's major waterways, mainly produced in the plains south of the Yangtze River, fish bile toxic.