Enlargement of a detail at the large JSLC screen seems to confirm now that the real designation of the CZ-2C/CZ-2D/CZ-4C launch pad is East Wind 9401 station (东风9401工位). Under http://novosti-kosmonavtiki.ru/forum/forum13/topic7415/?PAGEN_1=8 Liss has provided some additional sources which supports this On the other side I have never seen an official document which supports the 603 number for the pad. I have also found the designation 9406-2 and 9406-3 for camera positions around the 9401 launch pad.