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Eastern Rome Hangzhou Greek fire Wu Yueguo Qian Miao
12-29
Byzantine Empire Greek fire Constantinople gunpowder Arab Muawiyah
12-25
Greek fire gunpowder Byzantine Empire Greece_History
12-17
![How did the Zhenguo heavy equipment of the Eastern Roman Dynasty appear in Hangzhou?[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)
