Mr Onoja said civilians were oblivious to the techniques involved in handling explosive remnants.
Iran has condemned Israel’s airstrike on an Iranian field hospital along the Syria-Lebanon border, calling it a “war crime.”
Local medical sources said the bombing led to the killing of at least 21 people.
China maintains close ties with Iran, importing large quantities of oil from the country, which remains under sanction by Western countries.
The video released on Wednesday shows the Al Ahli hospital and a car park in Gaza City, comparing aerial shots before and after the deadly incident.
