July 28 (Reuters) - Guangdong Advertising Co Ltd  
   002400.SZ
             * Says board agrees to invest 188.1 million yuan ($30.41 million) in Guangzhou Zhongmao Advertising Co      * Says signs strategic agreement with IT solutions and service provider United Electronics Co on business development           Source text in Chinese: 
   http://bit.ly/1xmObld
  ; 
   http://bit.ly/1kiiUQ4
        Further company coverage:  
   002400.SZ
     ($1 = 6.1860 Chinese Yuan)   (Reporting by Hong Kong newsroom)  ((twinnie.siu@thomsonreuters.com)(852-2841 5763)(Reuters Messaging: twinnie.siu.thomsonreuters.com@reuters.net))  Keywords: GD ADVERTISING/BRIEF