At present, the full name of the government of Nanjing is "People's Government of Nanjing City" and the city is under the one-party rule of the CPC, with the CPC Nanjing Committee Secretary as the de facto governor of the city and <answer>the mayor</answer> as the executive head of the government working under the secretary.
who is the executive leader of Nanjing, working under the secretary?
the mayor