风掣雷行

Explanation: Switch: flash. Wind thunder flash. Described as rapidly as the wind and thunder. 　　Source: Qing Anonymous "tour in Vietnam in mind," foreign market street, vertical and horizontal wells, though not flat and Shanghai, while the rickshaw carriage between stream, the wind button thunder line " 　　Examples: Foreign market street, vertical and horizontal wells, though not flat and Shanghai, while the endless stream of carriage between rickshaw, ~ (Qing Anonymous "You remember Vietnam")