"ascent of the peak from the North Ridge" . . . "first climb of Everest from the north side" . "1960 Chinese Mount Everest expedition" . . "Chinese Expedition Northern Slope" . "Chinese Mount Everest expedition team" . "ascent of the peak from the north ridge" . . "the first ascent of Mount Everest via the north route" . "first ascent via the north ridge" . "1960-05-25" . "1960" . "1960 Chinese Mount Everest expedition" . . "1960 Chinese" .