R. G. Springsteen and Zheng Junli were both what?
R. G. Springsteen Robert G. Springsteen (September 8, 1904 – December 9, 1989) was an American director of Hollywood B movies and television shows. He was most often credited on screen as R. G. Springsteen.
Guo Zhengtang Professor Guo Zhengtang (Simplified Chinese: 郭正堂, Pinyin: Guō Zhèngtáng; born April 8, 1964) is a Cenozoic geologist from China.