Question: Are Yong'an and Luzhou both cities in China?
Sentence (from "Luzhou"): Situated at the confluence of the Tuo River and the Yangtze River, Luzhou is not only an important port on the Yangtze river, but also the largest port in both size and output in Sichuan province since Chongqing seceded from Sichuan province in 1997.
Relevant evidence: No