In 1882，the Qing signed a treaty with the Chosun to abolish the maritime policy forbidding fishery in designated sea areas，thus legitimating fishery across the borders.Through this treaty，the Qing intended to enlarge the area for fishery by fishermen from Shandong and Fengtian provinces，while the Chosun，in allowing Chinese fishermen in its near sea areas，aimed to maintain stability and order along its west coast.Nevertheless，there occurred frequently armed conflicts，thus exacerbating the bilateral relations on fishery.Apart from the vested interests by local custom offices in the Qing，a profound reason was the intense competition between China and Japan in the sea areas close to Korea.