Zhècì fēnghuì jùjí le Tàipíngyáng zhōubiān de zhǔyào jīngjìtǐ.
The summit gathered the major economies of the Pacific Rim.
Tips
usage
More commonly written as 环太平洋 ('around the Pacific'), e.g. 环太平洋经济合作 (Pacific Rim economic cooperation), 环太平洋火山带 (Pacific Ring of Fire). 太平洋周边 is the looser, news-style phrasing.