Diana told Chen Ke where the hand grenades were most likely kept—the courtyard's crates certainly wouldn't be stuffed with those dangerous explosives. The storage conditions for weapons equipment were very strict, typically similar to basements or specialized cold storage rooms. Considering the size of this place, searching for them shouldn't be too difficult.
Chen Ke got out of the car and easily scaled the courtyard's surrounding wall. A security guard was patrolling among the crates, but he didn't seem very attentive.
Chen Ke casually strolled along, skillfully using the crates to shield himself from the guard's view, unworriedly making his way to the white building at the north side of the yard, where a large storage room was located on one side.