Taoist philosophy also known as Taology refers to the various philosophical currents of Taoism, a tradition of Chinese origin which emphasizes living in harmony with the Dào. The Dào is a mysterious and deep principle that is the source, pattern and substance of the entire universe.
Bagua diagram from Zhao Huiqian's (趙撝謙) Liushu benyi (六書本義, c. 1370s).
Sima Chengzhen
Confucianism, Taoism, and Buddhism are one, a painting in the litang style portraying three men laughing by a river stream, 12th century, Song dynasty.
Mādhyamaka, otherwise known as Śūnyavāda and Niḥsvabhāvavāda, refers to a tradition of Buddhist philosophy and practice founded by the Indian Buddhist monk and philosopher Nāgārjuna. The foundational text of the Mādhyamaka tradition is Nāgārjuna's Mūlamadhyamakakārikā. More broadly, Mādhyamaka also refers to the ultimate nature of phenomena as well as the non-conceptual realization of ultimate reality that is experienced in meditation.
Nāgārjuna (right) and Āryadeva (middle).
Kamalashila
Thangkha with Jonang lama Dolpopa Sherab Gyaltsen (1292–1361)
Tsongkhapa