On the 16th local time, the National Hurricane Center of the United States indicated that the hurricane “Erin” had intensified into a Category 5 hurricane with maximum sustained winds of up to 160 miles per hour (approximately 257 kilometers). According to the standards of the National Hurricane Center, hurricanes are classified into five levels, namely Category 1, 2, 3, 4, and 5 hurricanes, with corresponding maximum wind speeds increasing gradually. (Xu Tao)