gǎi zào / lǎo chéng qū / shí / jī chǔ shè shī / jiàn shè / hé / lì shǐ jiàn zhù / bǎo hù / bì xū / bìng jìn

改造老城区时，基础设施建设和历史建筑保护必须并进。

When renovating an old urban district, infrastructure development and the preservation of historic buildings must advance together.