The Silk Road in Northwest of China is the hometown of rock-color paintings. The originaltrace of skills of Japanese rock-color paintings can be found in Dunhuang and Kizil.
中国西北部的丝绸之路段是岩彩画的故乡，现代日本岩彩画的主要技法可以在敦煌，克孜尔找到原始的踪迹。
2
A trace relationship between the original requirement and the branch requirement can help you stay in touch with changes that are made to requirements by other teams.
原始需求与分支需求之间的追溯关系，可以帮助您对其他团队对需求所做的变更能保持一致。
3
One mechanism that can be used is to establish a trace relationship between the original and the branch requirement (Figure 13. Tracking original and branch requirement by trace relationship).