The Member asking a question is allowed to ask a short supplementary question on his question.

提出质询的议员可就其质询提出一项简短的补充质询。

youdao

Mr McMullan was then reprimanded by the Speaker for reading out his supplementary question.

BBC: Question Time

In a supplementary question Bolivians will also be asked to choose to limit landholdings either to 5, 000 hectares (12, 400 acres) or to 10, 000 hectares.

ECONOMIST: Bolivia's new constitution

Actually, he had opened by plunging straight into his supplementary - without asking the warm-up question on the order paper.

BBC: Serious issues at first minister's questions