If you looked at the broader picture that was more zoomed out, the Chinese shell was part of large cluster of shells placed beside the Indian shells. The camera only made it look like the Indian ammo sign was in front of it.
http://www.app.com.pk/photo/photo_lib/02-11-2009/ef602d1771334edace094cda6e35db10.jpg
You see? There is a long line of shells, and the “Indian Ammo” sign is only placed at the far left extreme of the line, in front of a small group of shells with English writing on them.