Each 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.I hope you know that sikkim was taken by india under chinese nose in 1975
Entire Bangladesh army has 10 infantry divisons with 1 armoured brigade equipped with weak light tanks and 1960s era type 59s. Bangladeshi divisions are smaller in terms of manpower and equipment than indian divisions. Indian Eastern command alone has 12 infantry and mountain divisions with 4 corps including one strike corps and 12 assam rifles sector brigades under them. They also have an armoured division in reserve as well as multiple indepdenent armoured brigades.