China was a major sea power during various periods in its history, most notably during the Ming Dynasty (1368–1644) and the early Qing Dynasty (1644–1912). The Chinese treasure fleets, led by Admiral Zheng He, undertook extensive maritime expeditions in the early 15th century, reaching as far as Africa and the Arabian Peninsula. These voyages were intended for diplomatic, trade, and exploration purposes, showcasing China's naval prowess and technological advancements.
However, after the death of Emperor Yongle and the ascension of conservative rulers, China shifted its focus from maritime exploration to internal stability, and policies were enacted to limit maritime activities. The construction of large ocean-going ships was discontinued, and China withdrew from its outward-looking stance. This withdrawal, combined with other factors, contributed to China's diminished maritime influence in subsequent centuries.