Zhang Dejiang (2nd L), who chairs China's communist-controlled legislature, and Hong Kong Chief Executive Leung Chun-ying (3rd L) are shown a specialised wheelchair as they take a tour of an innovation booth at Science Park as part of an event surrounding the Belt and Road Summit being held in Hong Kong on May 18, 2016. The three-day trip to Hong Kong by Zhang Dejiang, who chairs China's communist-controlled legislature, is the first by such a senior official for four years. His visit comes as concerns grow that freedoms are under threat in semi-autonomous Hong Kong as Beijing tightens its grip. / AFP PHOTO / POOL / ISAAC LAWRENCEISAAC LAWRENCE/AFP/Getty Images
