EXHIBIT 31.1

                     RULE 13A-14(A)/15D-14(A) CERTIFICATION

         I, Larry Liu, certify that:

         1. I have reviewed this quarterly report on Form 10-Q of Cybrdi, Inc.

         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 made, not
        misleading with respect to the period covered by this quarterly 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 issuer as of, and for, the periods presented in this report;

         4. The issuer's other certifying officer(s) and I are responsible for
        establishing for establishing and maintaining disclosure controls and
        procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e))
        and the internal control over financial reporting (as defined in
        Exchange Act Rule 13a-15(f) and 15d-15(f) for the issuer 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 issuer,
        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. Evaluated the effectiveness of the issuer's disclosure
        controls and procedures and presented in this report our conclusions
        after the effectiveness of the disclosure controls and procedures, as of
        the end of the period covered by this report based on such evaluation;
        and

                  c. Disclosed in this report any change in the issuer's
        internal control over financial reporting that occurred during the
        issuer's most recent fiscal quarter (the issuer's fourth fiscal quarter
        in the case of an annual report) that has materially affected, or is
        reasonably likely to materially affect, the issuer's internal control
        over financial reporting; and

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

                  a. All significant deficiencies in the design or operation of
        internal control over financial reporting which are reasonably likely to
        adversely affect the issuer'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
        issuer's internal control over financial reporting.

         July 15, 2005

                                              By: /s/ Larry Liu
                                              --------------------------------
                                              Larry Liu,
                                              CEO, principal executive officer