Zigong (simplified Chinese: 自贡; traditional Chinese: 自貢; pinyin: Zìgòng; Wade–Giles: Tzu⁴-kung⁴), formed by the merger of the two former towns of Ziliujing (Tzuliuching) and Gongjing (Kungching), is a prefecture-level city and the third largest city in Sichuan province, People's Republic of China.