那他为什么要访问日本呢？
如此看来，李的访日可视作为谢访日铺路。[{'character': '如', 'pinyin': 'ru2', 'highest pitch': 11.18, 'lowest pitch': 9.32, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '此', 'pinyin': 'cii3', 'highest pitch': 10.05, 'lowest pitch': 8.34, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '看', 'pinyin': 'kan4', 'highest pitch': 10.02, 'lowest pitch': 7.73, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '来', 'pinyin': 'lai2', 'highest pitch': 9.09, 'lowest pitch': 6.79, 'duration': 0.28, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.19}, {'character': '李', 'pinyin': 'li3', 'highest pitch': 8.35, 'lowest pitch': 6.45, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 11.18, 'lowest pitch': 6.45, 'duration': 0.12, 'prosody hierarchy': '#1'}, {'character': '访', 'pinyin': 'fang3', 'highest pitch': 11.18, 'lowest pitch': 6.47, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '日', 'pinyin': 'riii4', 'highest pitch': 11.13, 'lowest pitch': 6.61, 'duration': 0.24, 'prosody hierarchy': '#2'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.05}, {'character': '可', 'pinyin': 'ke3', 'highest pitch': 8.68, 'lowest pitch': 7.16, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '视', 'pinyin': 'shiii4', 'highest pitch': 9.55, 'lowest pitch': 6.99, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '作', 'pinyin': 'zuo4', 'highest pitch': 8.11, 'lowest pitch': 6.5, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 9.12, 'lowest pitch': 6.5, 'duration': 0.24, 'prosody hierarchy': '#2'}, {'character': '谢', 'pinyin': 'xie4', 'highest pitch': 10.87, 'lowest pitch': 8.95, 'duration': 0.28, 'prosody hierarchy': '#1'}, {'character': '访', 'pinyin': 'fang3', 'highest pitch': 11.18, 'lowest pitch': 5.49, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '日', 'pinyin': 'riii4', 'highest pitch': 11.13, 'lowest pitch': 6.1, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '铺', 'pinyin': 'pu1', 'highest pitch': 10.33, 'lowest pitch': 9.55, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '路', 'pinyin': 'lu4', 'highest pitch': 10.95, 'lowest pitch': 5.93, 'duration': 0.28, 'prosody hierarchy': '#4'}]