The early 20th century and the period from the 1960s–80s were often regarded as the golden ages of the wuxia genre. Xiang Kairan (pen name Pingjiang Buxiaosheng) became the first notable wuxia writer, with his debut novel being "The Peculiar Knights-Errant of the Jianghu" (江湖奇俠傳). It was serialised from 1921–28 and was adapted into the first wuxia film, "The Burning of the Red Lotus Temple" (1928). Zhao Huanting (趙煥亭), who wrote "Chronicles of the Loyal Knights-Errant" (奇俠精忠傳, serialised 1923–27), was another well-known wuxia writer based in Shanghai. Starting from the 1930s, wuxia works proliferated and its centre shifted to Beijing and Tianjin in northern China. The most prolific writers there were collectively referred to as the "Five Great Masters of the Northern School" (北派五大家): Huanzhulouzhu, who wrote "The Swordspeople from Shu Mountains" (蜀山劍俠傳); Gong Baiyu (宮白羽), who wrote "Twelve Coin Darts" (十二金錢鏢); Wang Dulu, who wrote "The Crane-Iron Pentalogy" (鹤鉄五部作); Zheng Zhengyin (郑証因), who wrote "The King of Eagle Claws" (鹰爪王); Zhu Zhenmu (朱貞木), who wrote "The Seven 'Kill' Stele" (七殺碑).