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He had persuaded his science teacher to help him make a makeshift rocket. Somehow, he had managed to get his hands on the ingredients for gunpowder - potassium nitrate, sulphur and charcoal.。业内人士推荐同城约会作为进阶阅读
（作者为中国社会科学院学部委员、台湾史研究中心主任），推荐阅读WPS官方版本下载获取更多信息
Additional reporting by Antoine Schirer, Rafid Hossain and Victoria Arakelyan.
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