<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.kwa mujibu wa pear video, mzee wa miaka 50 kwa jina zheng alisimamishwa na maafisa wa polisi katika kituo cha mabasi cha duyun, katika mkoa wa guizhou baada ya mikono miwili ya binadamu kugunduliwa na mtambo wa kiusalama tarehe 31 julai.  <response>: according to pear video, a 50-year-old man surnamed zheng was approached by authorities at a bus station in duyun, guizhou province, after the limbs showed up on the stations security scanner on 31 july. 