firm up the detailsv exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."
informal (confirm, decide)
确定 què dìng
敲定（合同等）细节 qiāo dìng （ hé tóng děng ） xì jié
The two sides are meeting to firm up the details of the agreement.