PART I Closing price per  common share (1) Average daily  trading volume High Low NT$ NT$ (in thousands) Second Quarter 73.03  69.14  12,341  Third Quarter 85.11  73.37  14,825  Fourth Quarter 93.25  84.74  14,251  October 87.54  10,795  November 93.25  87.42  13,781  December 91.19  87.54  17,856  Closing price per  common share (1) Average daily  trading volume High Low NT$ NT$ (in thousands) 2011 (through April 18) 91.80  86.70  11,978  First Quarter 91.60  12,209  January 89.48  88.70  8,927  February 88.30  86.70  15,900  March 91.60  87.40  12,816  Second Quarter (through April 18) 91.80  90.40  10,659  April (through April 18) 10.659  Market Price Information for Our American Depositary Shares  Our ADSs have been listed on the New York Stock Exchange under the symbol “CHT” since July 17, 2003.  The outstanding ADSs are identified by the CUSIP number 17133Q502. The table below shows, for the periods  indicated, the high and low closing prices and the average daily volume of trading activity on the New York  Stock Exchange for our ADSs. The closing price for our ADSs on the New York Stock Exchange on April 18,  2011 was US$31.33 per ADS. Each of our ADSs represents the right to receive ten shares.  Closing Price Per ADS (1) Average ADS  Daily Trading  Volume High Low US$ US$ (in thousands) 2006 19.77  15.49  992  2007 21.65  16.51  896  2008 26.62  17.50  1,428  2009 23.39  18.41  759  First Quarter 22.73  820  Second Quarter 21.85  18.83  1,046  Third Quarter 22.72  20.79  654  Fourth Quarter 23.39  21.89  524  2010 30.79  20.85  590  First Quarter 23.71  553  Second Quarter 23.38  21.80  788  Third Quarter 27.29  23.08  522  Fourth Quarter 30.79  27.31  500  October 28.48  431  November 30.50  28.58  533  December 30.79  28.97  534  2011 31.69  29.20  380  First Quarter 31.16  394  January 30.73  29.20  316  February 30.36  29.21  514  March 31.16  29.36  361  Second Quarter (through April 18) 31.69  31.00  313  April (through April 18) 102 (1)  The historical prices and volumes of our common shares traded on the Taiwan Stock Exchange have been  adjusted based on prior cash dividend payments, capital increases and capital reductions.  (1)  The historical prices and volumes of our ADSs traded on the New York Stock Exchange have been adjusted  based on prior cash dividend payments, capital increases and capital reductions. 