Obviously, we all know that Pakistan decided to buy VT4 (MBT3000) tanks. Actually, there has a fluctuated period.
China propagate VT4 in 2012 and introduce it to the Pakistan several years later. However, during multiple tests, VT4 didn't work well and always broke down. In 2017, the Pakistan officer said if the tank cannot pass the next test, deal will over. Chinese enginners totally spent 5 years to fix those problems, and finally VT4A tank won the race, the following is the history.
I really admire this Pakistan officer. He is serious and responsible to his country's people. Due to his kindness and spirit, VT4 survived and become better.