**Exhibit 8.1**

 

**LIST OF SUBSIDIARIES  (as of March 31, 201****2****)**

 
| **NAME   OF ENTITY**                                      | ** ** | **JURISDICTION OF INCORPORATION** |
|-----------------------------------------------------------|------------|-----------------------------------|
| CHIEF Telecom Inc.                                        |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| Chunghwa International Yellow   Pages Co., Ltd. |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| Chunghwa Investment Co., Ltd.                        |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| Chunghwa Precision Test Tech. Co., Ltd                    |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| Chunghwa System Integration Co., Ltd.                |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| Light Era Development Co., Ltd.                      |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| Senao International Co., Ltd.                        |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| Spring House Entertainment Inc.                           |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| Unigate Telecom Inc.                                      |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| Yao Yong Real Property Co., Ltd.                     |       | Taiwan, R.O.C.                    |
|                                                      |       |                              |
| New Prospect Investments Holdings Ltd.                    |       | British Virgin Islands            |
|                                                      |       |                              |
| Prime Asia Investments Group Ltd.                         |       | British Virgin Islands            |
|                                                      |       |                              |
| Chunghwa Investment Holding Company                       |       | Brunei                            |
|                                                      |       |                              |
| Concord Technology Co., Ltd.                         |       | Brunei                            |
|                                                      |       |                              |
| CHI One Investment Co., Ltd.                         |       | Hong Kong                         |
|                                                      |       |                              |
| Donghwa Telecom Co., Ltd.                            |       | Hong Kong                         |
|                                                      |       |                              |
| Senao International HK Limited                            |       | Hong Kong                         |
|                                                      |       |                              |
| Chunghwa Hsingta Company Ltd.                             |       | Hong Kong                         |
|                                                      |       |                              |
| Chunghwa Telecom Japan Co., Ltd.                     |       | Japan                             |
|                                                      |       |                              |
| Chief International Corp.                                 |       | Samoa Islands                     |
|                                                      |       |                              |
| Senao International (Samoa) Holding Ltd.                  |       | Samoa Islands                     |
|                                                      |       |                              |
| Glory Network System Service (Shanghai)   Co., Ltd.  |       | People’s Republic of China   |
|                                                      |       |                              |
| Chunghwa Telecom (China), Co., Ltd                   |       | People’s Republic of China   |
|                                                      |       |                              |
| Chunghwa Telecom Singapore Pte., Ltd.                |       | Singapore                         |
|                                                      |       |                              |
| Chunghwa Telecom Global, Inc.                        |       | United States of America          |

 

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| **NAME   OF ENTITY**                                    | ** ** | **JURISDICTION OF INCORPORATION** |
|---------------------------------------------------------|------------|-----------------------------------|
| Chunghwa Precision   Test Tech. USA Corporation         |       | United States of America          |
|                                                    |       |                              |
| Chunghwa Telecom Vietnam Co., Ltd.                 |       | Vietnam                           |
|                                                    |       |                              |
| Chunghwa Sochamp Technology Inc.                        |       | Taiwan, R.O.C.                    |
|                                                    |       |                              |
| Smartfun Digital Co., Ltd.                         |       | Taiwan, R.O.C.                    |
|                                                    |       |                              |
| Ceylon Innovation Co., Ltd.                        |       | Taiwan, R.O.C.                    |
|                                                    |       |                              |
| Senao Trading (Fujian) Co., Ltd.                   |       | People’s Republic of China   |
|                                                    |       |                              |
| Senao International Trading (Shanghai)   Co., Ltd. |       | People’s Republic of China   |
|                                                    |       |                              |
| Senao International Trading (Shanghai)   Co., Ltd. |       | People’s Republic of China   |
|                                                    |       |                              |
| Senao International Trading (Jiangsu) Co., Ltd.    |       | People’s Republic of China   |
|                                                    |       |                              |
| Jiangsu Zhenhua Information Technology   Company,LLC    |       | People’s Republic of China   |

 

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