History of changes

On Jul. 6, 2015:

- Added BABA, JD.

- Removed WX, VIT, etc.

On Aug. 14, 2011:

- Removed CCOG etc. Added WX.

On Dec. 22, 2007:

- Added XIN, VIT, QXM, and WH.

- Removed CAAS, LONG, XING, VIMC.

On Sep. 17, 2007:

- Added EJ, JRJC, and TSL.

- Removed TOMO.

On Aug. 12, 2007:

- Removed CBA.