VNET [21Vianet] SC 13G/A: (Original Filing)

[JOINT FILING AGREEMENT Dated: February 6, 2013 ATRIX ARTNERS HINA M Matrix China Management I, L.P. Matrix China I GP GP, Ltd. David Su Director ATRIX ARTNERS HINA M Matrix China Management I, L.P. Matrix China I GP GP, Ltd. David Su Director ATRIX HINA ANAGEMENT M Matrix China I GP GP, Ltd.] [CUSIP No. 90138A 10 3 1. Names of Reporting Persons Matrix Partners China I, L.P. 2. Check the Appropriate Box if a Member of a Group (See Instructions) ¨ (a) ¨ (b) 3. SEC Use Only 4. Citizenship or Place of Organization]

VNET [21Vianet] SC 13G/A: JOINT FILING AGREEMENT Dated: February 6, 2013 ATRIX

[JOINT FILING AGREEMENT Dated: February 6, 2013 ATRIX ARTNERS HINA M Matrix China Management I, L.P. Matrix China I GP GP, Ltd. David Su Director ATRIX ARTNERS HINA M Matrix China Management I, L.P. Matrix China I GP GP, Ltd. David Su Director ATRIX HINA ANAGEMENT M Matrix China I GP GP, Ltd.] [CUSIP No. 90138A 10 3 1. Names of Reporting Persons Matrix Partners China I, L.P. 2. Check the Appropriate Box if a Member of a Group (See Instructions) ¨ (a) ¨ (b) 3. SEC Use Only 4. Citizenship or Place of Organization]

BIDU [Baidu] 6-K: (Original Filing)

[Baidu Announces Fourth Quarter and Fiscal Year 2012 Results BEIJING, Feb. 4, 2013 — Baidu, Inc. (NASDAQ: BIDU), the leading Chinese language Internet search provider, today announced its unaudited financial results for the fourth quarter and fiscal year ended December 31, 2012[1]. http://photos.prnewswire.com/prnh/20081103/BAIDULOGO (Logo: Fourth Quarter and Fiscal Year 2012 Highlights • Total revenues • Total revenues • Operating profit] [FORM 6-K BAIDU, INC. Baidu Campus No. 10 Shangdi 10th Street Haidian District, Beijing 100085 The People’s Republic of China x ¨ Form 20-F ¨ ¨ BAIDU, INC. Robin Yanhong Li Chief Executive Officer 6-K 1 d480626d6k.htm FORM 6-K]

BIDU [Baidu] 6-K: Baidu Announces Fourth Quarter and Fiscal Year 2012

[Baidu Announces Fourth Quarter and Fiscal Year 2012 Results BEIJING, Feb. 4, 2013 — Baidu, Inc. (NASDAQ: BIDU), the leading Chinese language Internet search provider, today announced its unaudited financial results for the fourth quarter and fiscal year ended December 31, 2012[1]. http://photos.prnewswire.com/prnh/20081103/BAIDULOGO (Logo: Fourth Quarter and Fiscal Year 2012 Highlights • Total revenues • Total revenues • Operating profit] [FORM 6-K BAIDU, INC. Baidu Campus No. 10 Shangdi 10th Street Haidian District, Beijing 100085 The People’s Republic of China x ¨ Form 20-F ¨ ¨ BAIDU, INC. Robin Yanhong Li Chief Executive Officer 6-K 1 d480626d6k.htm FORM 6-K]

VNET [21Vianet] SC 13G/A: SCHEDULE 13G/A (Amendment No. 1) 21Vianet Group, Inc

[SCHEDULE 13G/A (Amendment No. 1) 21Vianet Group, Inc (Name of Issuer) Class A Common Stock (Title of Class of Securities) 90138A103 (CUSIP Number) December 31, 2012 (Date of Event Which Requires Filing of this Statement) o Rule 13d-1(b) x Rule 13d-1(c) o Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person’s initial filing]

VNET [21Vianet] SC 13G/A: (Original Filing)

[SCHEDULE 13G/A (Amendment No. 1) 21Vianet Group, Inc (Name of Issuer) Class A Common Stock (Title of Class of Securities) 90138A103 (CUSIP Number) December 31, 2012 (Date of Event Which Requires Filing of this Statement) o Rule 13d-1(b) x Rule 13d-1(c) o Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person’s initial filing]

GIGM [GIGAMEDIA] 6-K: (Original Filing)

[Purchase of GigaMedia shares by CEO Collin Hwang The company has been informed by its Chief Executive Officer Collin Hwang that he purchased a total of 961,200 shares of GigaMedia stock at an average price of $0.96 during the week of December 17, 2012. The purchases were made during an open window period and in full compliance with all company]

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