Number + 吨
The measure word 吨 (dūn) is used to count metric tons, a unit of weight equal to 1,000 kilograms. It appears after a number and is commonly used in contexts involving large-scale quantities such as industrial production, cargo, and environmental statistics.
这座工厂每天能生产五百吨钢铁。
Zhè zuò gōngchǎng měitiān néng shēngchǎn wǔbǎi dūn gāngtiě.
This factory can produce five hundred tons of steel every day.
救灾物资共计三十吨已经运到了。
Jiùzāi wùzī gòngjì sānshí dūn yǐjīng yùn dào le.
A total of thirty tons of disaster relief supplies have been delivered.
这艘货船装载了两万吨煤炭。
Zhè sōu huòchuán zhuāngzài le liǎng wàn dūn méitàn.
This cargo ship is loaded with twenty thousand tons of coal.