In addition to the equipment, the large backpack Tang Yuan just threw over contained several small oxygen tanks. These tanks aren't as big as oxygen cylinders and are about the size of a regular thermos, making them ideal for carrying around. However, the oxygen stored in these tanks isn't much; one tank can last for a mere seven or eight minutes at most.
With three oxygen tanks strapped to his waist, Ling Chen hastily packed, slinging the oxygen cylinder over his back. The oxygen cylinder was almost used up, with only one-fifth remaining. For Ling Chen, it could barely hold out for a short while.
Coming out of the office, Ling Chen rushed straight down the stairs. At present, everyone had been rescued, leaving only Nanrong Wanqing and Leng Feifei in the whole building. Find them both and get them out; his task would be considered complete.
