Which ancient Chinese explorer is credited with pioneering the maritime voyages that expanded China's influence in the early 15th century, and what was the name of his fleet?

Admiral Zheng He is credited with pioneering maritime voyages that expanded China’s influence in the early 15th century. His fleet was known as the “Treasure Fleet,” and Zheng He conducted several large-scale expeditions across the Indian Ocean, reaching as far as the eastern coast of Africa.