提出宇文恺规划和营建东都洛阳城时，是在西苑引谷水和洛河入积翠池，经皇城前黄道渠入通济渠的。
When Yuwen Kai designed and constructed Luoyang city , the Gu and Luo Rivers were introduced from Jicui pool at Xiyuan through Huangdao trench in front of the imperial city to Tongji trench .
翠池