大作广告 meaning in Chinese

blurb

Chunlan electronic group heavily advertises its product on radio and television
春兰电子集团在电台和电视上大作广告。
It was clear that the company ' s left hand didn ' t know what its right hand was doing ? one department was advertising for more workers while another was saying that the whole firm was soon going to close down
显然这家公司的内部是各敲各的锣?一个部门为招聘更多的工人大作广告，而另一个部门则说整个公司濒临倒闭。