The Japanese were therefore able to land their troops in Korea without interruption, and soon overran the peninsula. When they were advancing to capture Ping-yang, the Chinese began to concentrate a second army to defend the crossing of the Yalu River, the entrance into Southern Manchuria. It was now evident even to the Pekin mandarins that the Japanese plans did not at this stage of the war include a raid on the Pei-ho and the Chinese capital, so Admiral Ting was at last allowed to go to sea, in order to protect the movement of transports along the western shores of the Korean Bay to the mouth of the Yalu. On 14 September five large steamers crowded with troops left Taku under the convoy of six Chinese cruisers and four torpedo boats, bound for the mouth of the Yalu River. Next day, as they passed Talienwan Bay, near Port Arthur, they were joined by Ting with the rest of the fleet. On the second day they safely reached their destination, and the troops were disembarked. And early on the 17th Ting again put to sea with his fleet to return to Port Arthur. He had expected to have to fight the Japanese on his outward voyage, and he knew that there was a still greater chance of meeting them on his way back down the bay. He had a few white officers with him. On board his flagship, the armour-clad "Ting-yuen" was a German artillery officer, Major von Hanneken. On the other battleship was Commander McGiffen, formerly of the United States navy, nominally second in command to the Chinese captain of the "Chen-yuen," but practically acting as her commander. On some of the other ships there were a few British-born engineer or gunnery officers, and some of the latter had been petty officers in the English navy. By the advice of these non-Chinese officers Ting had done something to remedy the defects of his fleet.