请问这家公司是干什么的？
证券简称为“杭齿前进”，证券代码为“六零幺幺七七”。[{'character': '证', 'pinyin': 'zheng4', 'highest pitch': 11.47, 'lowest pitch': 9.31, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '券', 'pinyin': 'qvan4', 'highest pitch': 9.79, 'lowest pitch': 8.57, 'duration': 0.28, 'prosody hierarchy': '#2'}, {'character': '简', 'pinyin': 'jian3', 'highest pitch': 8.57, 'lowest pitch': 4.56, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '称', 'pinyin': 'cheng1', 'highest pitch': 10.02, 'lowest pitch': 5.35, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 9.67, 'lowest pitch': 8.01, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '杭', 'pinyin': 'hang2', 'highest pitch': 10.82, 'lowest pitch': 7.7, 'duration': 0.32, 'prosody hierarchy': 'null'}, {'character': '齿', 'pinyin': 'chiii3', 'highest pitch': 10.82, 'lowest pitch': 5.97, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '前', 'pinyin': 'qian2', 'highest pitch': 6.83, 'lowest pitch': 5.45, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '进', 'pinyin': 'jin4', 'highest pitch': 8.82, 'lowest pitch': 5.98, 'duration': 0.24, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.49}, {'character': '证', 'pinyin': 'zheng4', 'highest pitch': 11.47, 'lowest pitch': 9.33, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '券', 'pinyin': 'qvan4', 'highest pitch': 9.79, 'lowest pitch': 9.27, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '代', 'pinyin': 'dai4', 'highest pitch': 11.06, 'lowest pitch': 9.78, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '码', 'pinyin': 'ma3', 'highest pitch': 9.78, 'lowest pitch': 5.39, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 9.67, 'lowest pitch': 5.31, 'duration': 0.3, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.25}, {'character': '六', 'pinyin': 'liou4', 'highest pitch': 8.71, 'lowest pitch': 7.15, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '零', 'pinyin': 'ling2', 'highest pitch': 7.86, 'lowest pitch': 6.69, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '幺', 'pinyin': 'iao1', 'highest pitch': 10.19, 'lowest pitch': 7.86, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '幺', 'pinyin': 'iao1', 'highest pitch': 10.19, 'lowest pitch': 9.55, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '七', 'pinyin': 'qi1', 'highest pitch': 9.92, 'lowest pitch': 9.61, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '七', 'pinyin': 'qi1', 'highest pitch': 9.92, 'lowest pitch': 9.61, 'duration': 0.32, 'prosody hierarchy': '#4'}]