These missiles can defeat electronic and kinetic countermeasures, attack the vulnerable top of the tank and do not require continuous guidance or tracking by an exposed operatorEach infantry division of Bangladesh army contains one regiment of Chinese tanks. The 11 infantry division in Bogra alone contains 1 brigade of Chinese tanks. The Chinese tanks (T-59 and T-69) were upgraded by new ERA (Explosive Reactive Armour), 125mm canons, and new more powerful engines. They have purchased 44 units MBT-2000 medium tanks and 44 units VT-5 Light tanks recently. So your information about having just one armoured brigade is a blatant lie.