BRIEF-Changjiang Securities' biggest shareholder to buy more company shares in 12 months
* Says its biggest shareholder plans to buy at least 30 million shares in the company in next 12 months after adding about 0.1 percent stake on May 23
Dec 22 Goldman Sachs Group Inc
* Goldman Sachs says Kullman's appointment expands board to 14 directors, 11 of whom are independent
* Goldman Sachs says appoints Ellen Kullman as an independent director of co, effective immediately Source text: (bit.ly/2hXOkfZ) Further company coverage:
NEW YORK, May 23 Companies creating and issuing tokens to raise capital for their projects have a responsibility to protect their investors, said a U.S. Securities and Exchange Commission official on Tuesday, the first public comments on the issue made by an agency employee.