See e.g. the apparently exhaustive list of China's border crossing in Xinjiang (新疆边贸口岸信息汇总Archive.today的存檔，存档日期2013-02-19, 2009-05-07), which includes no crossings on the border with Russia. The list of Russia's border crossings at rosgranitsa.ru does not include any crossings in that area either.
中华人民共和国和俄罗斯联邦关于中俄国界西段的协定 （页面存档备份，存于互联网档案馆） (Agreement between the PRC and RF in regard to the western section of the China-Russia border), 1994-09-03 （中文）
Chen, Qimao, Sino-Russian relations after the break-up of the Soviet Union, Chufrin, Gennady (编), Russia and Asia: the Emerging Security Agenda(PDF): 288–291, [2017-07-08], （原始内容(PDF)存档于2016-05-19）
中华人民共和国和俄罗斯联邦关于中俄国界西段的协定 （页面存档备份，存于互联网档案馆） (Agreement between the PRC and RF in regard to the western section of the China-Russia border), 1994-09-03 （中文）
Chen, Qimao, Sino-Russian relations after the break-up of the Soviet Union, Chufrin, Gennady (编), Russia and Asia: the Emerging Security Agenda(PDF): 288–291, [2017-07-08], （原始内容(PDF)存档于2016-05-19）
See e.g. the apparently exhaustive list of China's border crossing in Xinjiang (新疆边贸口岸信息汇总Archive.today的存檔，存档日期2013-02-19, 2009-05-07), which includes no crossings on the border with Russia. The list of Russia's border crossings at rosgranitsa.ru does not include any crossings in that area either.
