Mathematics emerged independently in China by the 11th century BC. The Chinese independently developed concepts like large and negative numbers, decimals, algebra, geometry, and trigonometry. Early Chinese mathematics before 254 BC is not well documented, though they focused on astronomy and practical tasks rather than formal systems. Ancient Chinese mathematicians advanced algorithm development and algebra, with significant developments in the 13th century. Elements of early Chinese mathematics correspond to modern branches like number theory and geometry. The Pythagorean theorem and Pascal's triangle existed in China before Pythagoras and Pascal.