[SCHEDULE 13G Sina Corporation (Name of Issuer) COM (Title of Class of Securities) G81477104 (CUSIP Number) 12/31/2019 (Date of Event Which Requires Filing of this Statement) ☑ Rule 13d-1(b) ☐ Rule 13d-1(c) ☐ Rule 13d-1(d) The remainder of this cover page shall be filled out for a reporting person’s ]