Chinese troops march as they take part in Pakistan Day military parade in Islamabad, Pakistan, March 23, 2017. REUTERS/Faisal Mahmood - RTX32BIE

Commandos from the Special Services Group (SSG) march during Pakistan Day military parade in Islamabad, Pakistan, March 23, 2017. REUTERS/Faisal Mahmood - RTX32BIR

Saudi troops march as they take part in Pakistan Day military parade in Islamabad, Pakistan, March 23, 2017. REUTERS/Faisal Mahmood - RTX32BIN

Pakistan's Prime Minister Nawaz Sharif arrives to attend the Pakistan Day military parade in Islamabad, Pakistan, March 23, 2017. REUTERS/Faisal Mahmod - RTX32BLL

Image used for illustrative purposes. Pakistan's Prime Minister Nawaz Sharif waves from a vehicle as he arrives to attend the Pakistan Day military parade in Islamabad, Pakistan, March 23, 2017. REUTERS/Faisal Mahmood - RTX32BH1

Pakistan's Prime Minister Nawaz Sharif (R) and President Mamnoon Hussain (C) arrive to attend the Pakistan Day military parade in Islamabad, Pakistan, March 23, 2017. REUTERS/Faisal Mahmod - RTX32BOO

Chinese troops march as they take part in Pakistan Day military parade in Islamabad, Pakistan, March 23, 2017. REUTERS/Faisal Mahmood - RTX32BL3

Chinese troops march as they take part in Pakistan Day military parade in Islamabad, Pakistan, March 23, 2017. REUTERS/Faisal Mahmood - RTX32BIL