Taoism is an ancient Chinese philosophical and religious system, worshipping the Tao as its principal deity and venerating Lao Tzu as its founder. Its core tenets are "Wu Wei" (living in harmony with nature) and "Tao" (the path, the universe). Taoist cultivation (immortality) aims for longevity and immortality through internal cultivation (qigong, health preservation) and external cultivation (alchemy).