<prompt> Translate the following text to EnglishJiji hilo lenye watu 20,000 limekua kuwa jiji kubwa lenye watu milioni 2.5 na lina majengo mengi ya juu na viwanda vya China.  <response>: From a population of 20,000 it has grown into a metropolis of 2.5 million, with tightly clustered skyscrapers and some of Chinas highest groseng industries. 