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                                                                    EXHIBIT 12.1

                  CERTIFICATION BY THE CHIEF EXECUTIVE OFFICER
            PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Defu Dong, Chief Executive Officer of China Techfaith Wireless Communication
Technology Limited (the "Company"), certify that:

      1.    I have reviewed this annual report on Form 20-F of the Company;

      2.    Based on my knowledge, this report does not contain any untrue
            statement of a material fact or omit to state a material fact
            necessary to make the statements made, in light of the circumstances
            under which such statements were made, not misleading with respect
            to the period covered by this report;

      3.    Based on my knowledge, the financial statements, and other financial
            information included in this report, fairly present in all material
            respects the financial condition, results of operations and cash
            flows of the company as of, and for, the periods presented in this
            report;

      4.    The company's other certifying officer(s) and I are responsible for
            establishing and maintaining disclosure controls and procedures (as
            defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
            control over financial reporting (as defined in Exchange Act Rules
            13a-15(f) and 15d-15(f)) for the company and have:

                  (a)   Designed such disclosure controls and procedures, or
                        caused such disclosure controls and procedures to be
                        designed under our supervision, to ensure that material
                        information relating to the company, including its
                        consolidated subsidiaries, is made known to us by others
                        within those entities, particularly during the period in
                        which this report is being prepared;

                  (b)   Designed such internal control over financial reporting,
                        or caused such internal control over financial reporting
                        to be designed under our supervision, to provide
                        reasonable assurance regarding the reliability of
                        financial reporting and the preparation of financial
                        statements for external purposes in accordance with
                        generally accepted accounting principles;

                  (c)   Evaluated the effectiveness of the company's disclosure
                        controls and procedures and presented in this report our
                        conclusions about the effectiveness of the disclosure
                        controls and procedures, as of the end of the period
                        covered by this report based on such evaluation; and

                  (d)   Disclosed in this report any change in the company's
                        internal control over financial reporting that occurred
                        during the period covered by the annual report that has
                        materially affected, or is reasonably likely to
                        materially affect, the company's internal control over
                        financial reporting; and

      5.    The company's other certifying officer(s) and I have disclosed,
            based on our most recent evaluation of internal control over
            financial reporting, to the company's auditors and the audit
            committee of the company's board of directors (or persons performing
            the equivalent functions):

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                  (a)   All significant deficiencies and material weaknesses in
                        the design or operation of internal control over
                        financial reporting which are reasonably likely to
                        adversely affect the company's ability to record,
                        process, summarize and report financial information; and

                  (b)   Any fraud, whether or not material, that involves
                        management or other employees who have a significant
                        role in the company's internal control over financial
                        reporting.

Date: June 29, 2007

By:    /s/ Defu Dong
       ---------------------------
Name:  Defu Dong
Title: Chief Executive Officer