You may make an inquiry with the border control authorities of the ports of entry in Beijing, Shanghai or Guangzhou or leave a message under the column of Asking Questions to the Police on the website of the Ministry of Public Security. Contact phone of the Beijing General Station of Immigration Inspection: 010-56095400; Contact phone of the Shanghai General Station of Immigration Inspection: 021-51105100; Contact phone of the Guangzhou General Station of Immigration Inspection: 020-32090088; Contact phone of the Provincial Border Control Bureau of Sichuan Province: 028-86022116. Website of the Ministry of Public Security: www.mps.gov.cn.