Uğur İbrahim Altay, Mayor of the Metropolitan Municipality of Konya (Turkey) Li Mingyuan, Mayor of Xi'an (China) Johnny Araya Monge, Mayor of San José (Costa Rica) Thembi Nkadimeng, Mayor of Polokwane Local Municipality (South Africa) Berry Vrbanovic, Mayor of Kitchener (Canada) and Jan van Zanen, Mayor of The Hague (Netherlands)