Beijing's Ciqikou is not far from the Temple of Heaven, and before the Lantern Festival people always queue there to buy yuanxiao.
Tips
memory
磁器 is an old way of writing 瓷器 'porcelain'. The Chongqing town was a landing on the 嘉陵江 that shipped porcelain, and the Beijing name also goes back to the porcelain trade.
culture
Chongqing's Ciqikou is where 毛血旺 is said to have begun. Beijing's has the 锦芳 snack shop, famous for its 元宵.