He has two sons who work in Shanghai.

他有两个在上海工作的儿子。

youdao

He has two sons, who work in Shanghai.

他有两个儿子，他们在上海工作。

youdao

He has two sons, too.

他也有两个儿子。

youdao

He has two sons, one said to be bad and the other said to be better, who are waiting in line.

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He is married to Aurelia and has two sons and two daughters.

BBC: Profile: Sir George Young

In middle age, he is profoundly orphaned: his marriage has failed, his two young sons live with his former wife, his parents are dead.

NEWYORKER: Noble Savages