<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.reli yenye kasi ya juu nchini china ni kipaumbele , ikiwa na lengo la kuunganisha miji yake mikuu kwa treni ili kupunguza muda na gharama za usafiri ndani ya taifa hilo lenye idadi kubwa ya watu duniani.  <response>: high-speed trains are a major priority in china, which aims to connect more of its major cities by train to reduce the time and costs needed to travel through the worlds most populous country. 