 Complete the following phrase:  Between 1875 and 1880 China purchased 13 flat-iron gunboats from Britain and built another Tiong Sing at Shanghai. After the two Jiansheng class, the British-built boats were given names from the Greek alphabet, from Alpha through to Lambda, thus becoming known as the alphabetical gunboats. Although quickly given Chinese names, the class names seem to have stuck. A further pseudo-Rendel gunboat Hoi Tung Hung was built locally to the lines of the alphabetical flat-irons, but constructed from wood sheathed in iron. Fusheng and Jiansheng were lost in the Battle of Fuzhou in 1884 at the beginning of the Sino-French War. Four Chinese Rendel gunboats also took part in the 