The tools he invented for astronomy allowed him to calculate an accurate length for the year, which allowed the Chinese culture to set up a whole new system of exact dates and times, allowing for increasingly accurate recording of history and a sense of continuity throughout the country.
Guo Moruo | Western Guo | Guo Huai | Eastern Guo | Zhan Guo Ce | Guo Xi | Guo Lei | Guo Jing | Guo Boxiong | Bao Guo'an | Western Guo (state) | Ren Renfa, ''Elder Zhang Guo | Guo Ziyi | Guo Yi | Guo Yan | Guo Tu | Guo Si | Guo Shiqiang | Guo moruo | Guo jin min tui | Guo Jingjing | Guo Hongwei | Guo Dan | Eastern Guo (state) |