Hong Kong's Hang Seng Index opened down 55.02 points, or 0.23%, at 23,494.44 points on May 13 (Tuesday); Hong Kong's Hang Seng Technology Index opened down 15.74 points, or 0.29%, at 5,431.61 points on May 13 (Tuesday); China Enterprises Index opened down 14.32 points, or 0.17%, at 8,544.91 points on May 13 (Tuesday); Red Chip Index opened down 19.49 points, or 0.51%, at 3,839.19 points on May 13 (Tuesday).