Sihuan Pharmaceutical (HKG:0460) bought back 3,367,000 shares from the market for nearly HK$2.4 million, a May 2 Hong Kong bourse filing said.

The shares, which were repurchased on April 30 and May 2 at an average price of HK$0.71 per share, will be held as treasury shares.

The shares represent approximately 0.0364% of the biopharmaceutical company's total number of issued shares.