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				| Guan Tianpei's "A Tentative Collection on Preparing for Coastal Defense" |  
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				| Label on Guan Tianpei's "A Tentative Collection on Preparing for Coastal Defense" |  
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				| Guan Tianpei's "A Tentative Collection on Preparing for Coastal Defense" |  
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				| Humen Coastal Defense Cannon's back showing the 28400 lb weight |  
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				| One of the drawings in Guan Tianpei's "A Tentative Collection on Preparing for Coastal Defense" |  
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				| One of the drawings in Guan Tianpei's "A Tentative Collection on Preparing for Coastal Defense" |  
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				| Prof. Ching-chih Chen and Dongguan Public Library staff at the Humen Coastal Defense Cannon |  
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