(, , 1912-1965), Chen Gu'an (, , 1913-1993), and Wu Wenhan (, 1928-2019). A scholarly lineage from the start, Li's disciples authored many books and articles on t'ai chi and related subjects, in addition to training many disciples and students of their own. Chen Gu'an wrote a book on the 108-posture form he standardized for this lineage and another on the Wu (Hao) style staff. Wu Wenhan wrote a book on Wu (Hao)-style applications and a comprehensive collection of classic works on t'ai chi — from Li Yiyu's copy of the Wang Zongyue classic through major early twentieth century writers of all t'ai chi styles — as well as over 200 articles on the history and theory of the art. Wu Wenhan also researched and released in 1993 previously unknown works by Wu Yuxang's eldest brother Wu Chengqing. Those texts, along with other "lost classics" by Li Yiyu, Wu Ruqing, and Yang Banhou first revealed to the public between 1985 and 1993, expanded our understanding of the original history and thought of the founding generations and the T'ai Chi Classics. This lineage continues to thrive in China, and is represented worldwide by Texas-based Grandmaster Jimmy K. Wong (, , Wang Guoqiang, Wong Kokkhang), a disciple of Chen Gu'an and Wu Wenhan. Their schools practice a small frame 108-posture long form standardized by Chen Gu'an plus several small frame simplified forms, as well as straight sword, saber, staff, and other aspects of the art. More about forms in the Characteristics section. Li Baoyu (Li Xiangyuan) branch Focused on the old form of Hao Weizhen, most masters in this lineage call their art "Hao-style Taijiquan" (). The branch was founded by Li Baoyu (, Simplified Chinese , 1888-1961), who was also known by the courtesy name Li Xiangyuan (, Simplified Chinese ). Li was a native of Shunde in what is now Xingtai, Hebei, and was not related to Li Yiyu. Beginning at age 14 he trained under Liu Yingzhou () in San Huang Pao Chui, and then as an adult studied Yang Banhou t'ai chi ch'üan under Yang Luchan's eldest grandson Yang Zhaolin (, 1884-1922), before mastering Wu (Hao) style as a disciple of Hao Weizhen. Small and slightly built, Li Baoyu surprised many challengers, defeating all opponents in and out of the ring including several gangsters. Thrust into a hardscrabble life at an early age, martial arts provided strength and