No. of step | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
No. of location | 4 | 4 | 4 | 3 | 4 | 4 | 4 |
Ratio Qi | 0.161 | 0.123 | 0.089 | 0.061 | 0.032 | 0.012 | 0.009 |