China willing to upgrade economic corridor with Pakistanbr br Beijing is willing to work with Islamabad to build an upgraded version of an economic corridor linking the two countries, China's leader Xi Jinping told visiting Pakistani Prime Minister Shehbaz Sharif on Friday.br br Sharif pledged to ensure the safety of Chinese workers in Pakistan, state broadcaster CCTV reported. The report said that Sharif offered his government's condolences for the deaths in March of five Chinese engineers in a suicide bombing in Pakistan. They were working on a dam project in the South Asian country.br br The Pakistani leader, near the end of a five-day visit, is making his first trip to China since his election in March. The China-Pakistan Economic Corridor includes building and improving roads and rail systems to link western China's Xinjiang region to Pakistan's Gwadar port on the Arabian sea. It is part of Xi's Belt and Road Initiative to increase trade by building infrastructure around the world.