Which of the following Chinese cities were declared as sister cities to Karachi, Gwadar, and Multan on 29 March 2019?

A. Urumqi
B. Puyang
C. Xi’an
D. All of these
E. None of these

Chinese cities Urumqi, Puyang and Xi’an were declared as sister cities to Karachi, Gwadar, and Multan, respectively, at a forum held in Beijing on 29th March 2019 to strengthen the bond of friendship between the two countries.