gōng / chǎng / zhèng / zài / gǎi / jìn / rè / zhá / gōng / yì / yǐ / jiàng / dī / néng / yuán / xiāo / hào工厂正在改进热轧工艺,以降低能源消耗。The factory is improving its hot-rolling process to reduce energy consumption.