BRIEF-Betta Pharmaceuticals' Shareholders To Unload Up To 2.9% Stake In The Company

May 10 (Reuters) - Betta Pharmaceuticals Co Ltd:

* SAYS THREE SHAREHOLDERS PLAN TO UNLOAD UP TO A COMBINED 2.9% STAKE IN THE COMPANY WITHIN SIX MONTHS Source text in Chinese: https://bit.ly/2WJT7Gq Further company coverage: (Reporting by Hong Kong newsroom)