China's Yili Industrial Group, a senior sponsor of Expo 2010, distributed ice-cream coupons to volunteers at the Theme Pavilions on Wednesday.
The employees of Yili, a well known Chinese brand for milk products, also promoted the company's Weibo at the event. Weibo is a Chinese equivalent to Twitter.
Yili's Weibo carries the theme, "Green Society," advocating low-carbon lifestyle, wildlife conservation and green development. The website has attracted nearly 10,000 fans within ten days after its launch.