TIANJIN — Rozimemet Turghun has made an incredible journey in just two years, from sheepherder on the pastures, to robotics enthusiast competing on the national vocational skills stage. Representing his hometown team from the Xinjiang Uygur autonomous region, the 18-year-old stood among more than 4,000 contestants at the second Vocational Skills Competition, which closed late last month in Tianjin municipality. …