China's BlueFocus Communications has acquired Citizen Relations, which has more than 200 staffers in the US, Canada and UK.

CEO Oscar Zhao has a $300M war chest to acquire PR/advertising firms in the west.

The company acquired a $20 percent stake in Peter Chadlington's Huntsworth and We Are Social—both in London—last year. It picked up Fuseproject of San Francisco this summer.

Citizen Relations chief Daryl McCullough said in a statement that the alliance with BlueFocus would help power its growth plans.

He's "excited about the close cultural fit with Blue Focus, which, like Citizen, places a high entrepreneurialism and the happiness of our people and our clients."

McCullough joined PainePR, which rebranded in 2011 as CitizenPaine, more than two decades ago. He'll remain in his post.

Procter & Gamble, The Gap, Destination British Columbia, Best Buy, Habitat for Humanity, General Mills and Cirque du Soleil are among clients of Citizen Relations 

The acquisition structure calls for BlueFocus, which as a $4.6B market capitalization and 3,500 staffers, to acquire majority ownership in Vision 7 International, parent of Citizen Relations and Cossette ad agency.

The transaction has been in the works since May when Mill Road Capital, private equity firm in Connecticut, announced it was looking for a buyer of Vision7, which is had owned for the past five years.