Dec 2 (Reuters) - China Optoelectronics Holding Group Co Ltd 1332.HK :
* Chnoe-change of placing period and long stop date in relation to the placing of new shares under general mandate and trading halt 1332.HK
* Says company and the placing agent have entered into the supplemental placing agreement
* Says trading in the shares on the stock exchange was halted with effect from 9:00 a.m. on 1 December 2015
* Says trading will remain halted until further notice
* Source text for Eikon ID:nHKSWxg5h
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