You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Major China Websites Plan Blackout To Mark Earth Hour Users Will Have To Navigate By Spotlight In Campaign From BBH China By Anita Chang Beattie, Published on March 21, 2013 0 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Register Now Already a member? Log in.