未几

wǒ wèi jǐ jí lí hù běi shàng

我未几即离沪北上。

I left Shanghai for the north shortly afterward.

wèi jǐ tā biàn lí hù běi shàng le

未几他便离沪北上了。

Before long he left Shanghai and headed north.

tā shàng zhōu lái cǐ wèi jǐ qiǎo rán lí qù

他上周来此，未几悄然离去。

He came here last week, and soon afterwards left quietly.

nǐ yǐ wéi nà lǐ rén hěn duō shí zé wèi jǐ

你以为那里人很多，实则未几。

You thought there were lots of people but actually there is not so many.