Exhibit 10.31

CHINA INFORMATION SECURITY TECHNOLOGY, INC. OFFICER
EMPLOYMENT AGREEMENT

THIS AGREEMENT (The
Agreement) is made as of the August 12, 2008, and is by and between
China Information Security Technology, Inc. (formerly as China Public Security
Technology, Inc.), a Nevada corporation (hereinafter referred to as the
Company), and Yi Fu Liu (hereinafter referred to as the
COO).

BACKGROUND

The Board of Directors of the
Company desires to appoint Mr. Yi Fu Liu as its Chief Operating Officer (COO)
to fill an existing vacancy and to have Mr. Liu perform the duties of the COO
and Mr. Liu desires to be so appointed for such position and to perform the
duties required of such position in accordance with the terms and conditions of
this Agreement.

AGREEMENT

In consideration for the above
recited promises and the mutual promises contained herein, the adequacy and
sufficiency of which are hereby acknowledged, the Company and the COO hereby
agree as follows:

1. DUTIES. The
Company requires that Mr. Liu be available to perform the duties of Chief
Operating Officer customarily related to this function as may be determined and
assigned by the Board of Directors of the Company and as may be required by the
Companys constituent instruments, including its certificate or articles of
incorporation, bylaws and its corporate governance, each as amended or modified
from time to time, and by applicable law, including the Nevada Business
Corporation Act (the Act). Mr. Liu agrees to devote as much time as is
necessary to perform completely the duties as the COO of the Company.

2. TERM. The term
of this Agreement shall commence as of the date of the COOs appointment by the
Board of Directors of the Company and shall continue until the COOs removal or
resignation.

3. COMPENSATION. For all
services to be rendered by the COO in any capacity hereunder, the Company agrees
to pay the COO a fee of RMB 35,000 per month. Such fee may be adjusted from time
to time as agreed by the parties.

4. EXPENSES. In
addition to the compensation provided in paragraph 3 hereof, the Company will
reimburse the COO for pre-approved reasonable business related expenses incurred
in good faith in the performance of the COOs duties for the Company. Such
payments shall be made by the Company upon submission by the COO of a signed
statement itemizing the expenses incurred. Such statement shall be accompanied
by sufficient documentary matter to support the expenditures.

5. CONFIDENTIALITY.
The Company and the COO each acknowledge that, in order for the intents and
purposes of this Agreement to be accomplished, the COO shall necessarily be obtaining access to certain confidential
information concerning the Company and its affairs, including, but not limited
to business methods, information systems, financial data and strategic plans
which are unique assets of the Company (Confidential Information). The
COO covenants not to, either directly or indirectly, in any manner, utilize or
disclose to any person, firm, corporation, association or other entity any
Confidential Information.

---

6. NON-COMPETE.
During the term of this Agreement and for a period of twelve (12) months
following the COOs removal or resignation from the Board of Directors of the
Company or any of its subsidiaries or affiliates (the Restricted
Period), the COO shall not, directly or indirectly, (i) in any manner
whatsoever engage in any capacity with any business competitive with the
Companys current lines of business or any business then engaged in by the
Company, any of its subsidiaries or any of its affiliates (the Company's
Business) for the COOs own benefit or for the benefit of any person or
entity other than the Company or any subsidiary or affiliate; or (ii) have any
interest as owner, sole proprietor, shareholder, partner, lender, director,
officer, manager, employee, consultant, agent or otherwise in any business
competitive with the Company's Business; provided, however, that
the COO may hold, directly or indirectly, solely as an investment, not more than
two percent (2%) of the outstanding securities of any person or entity which are
listed on any national securities exchange or regularly traded in the
over-the-counter market notwithstanding the fact that such person or entity is
engaged in a business competitive with the Company's Business. In addition,
during the Restricted Period, the COO shall not develop any property for use in
the Companys Business on behalf of any person or entity other than the Company,
its subsidiaries and affiliates.

7. TERMINATION. With or
without cause, the Company and the COO may each terminate this Agreement at any
time upon ten (10) days written notice, and the Company shall be obligated to
pay to the COO the compensation and expenses due up to the date of the
termination. Nothing contained herein or omitted herefrom shall prevent the
shareholder(s) of the Company from removing the COO with immediate effect at any
time for any reason.

8. INDEMNIFICATION. The
Company shall indemnify, defend and hold harmless the COO, to the full extent
allowed by the law of the State of Nevada, and as provided by, or granted
pursuant to, any charter provision, bylaw provision, agreement, vote of
stockholders or disinterested directors or otherwise, both as to action in the
COOs official capacity and as to action in another capacity while holding such
office.

9. EFFECT OF
WAIVER. The waiver by either party of the breach of any provision of this
Agreement shall not operate as or be construed as a waiver of any subsequent
breach thereof.

10. NOTICE. Any and all
notices referred to herein shall be sufficient if furnished in writing at the
addresses specified on the signature page hereto or, if to the Company, to the
Companys address as specified in filings made by the Company with the U.S.
Securities and Exchange Commission and if by fax to 86-755-83709333.

2

---

11. GOVERNING LAW.
This Agreement shall be interpreted in accordance with, and the rights of the
parties hereto shall be determined by, the laws of the State of Nevada without
reference to that states conflicts of laws principles.

12. ASSIGNMENT. The
rights and benefits of the Company under this Agreement shall be transferable,
and all the covenants and agreements hereunder shall inure to the benefit of,
and be enforceable by or against, its successors and assigns. The duties and
obligations of the COO under this Agreement are personal and therefore the COO
may not assign any right or duty under this Agreement without the prior written
consent of the Company.

13. MISCELLANEOUS.
If any provision of this Agreement shall be declared invalid or illegal, for any
reason whatsoever, then, notwithstanding such invalidity or illegality, the
remaining terms and provisions of the this Agreement shall remain in full force
and effect in the same manner as if the invalid or illegal provision had not
been contained herein.

14. ARTICLE
HEADINGS. The article headings contained in this Agreement are for reference
purposes only and shall not affect in any way the meaning or interpretation of
this Agreement.

15.
COUNTERPARTS.This Agreement may be executed in any number of
counterparts, all of which taken together shall constitute one instrument.
Facsimile execution and delivery of this Agreement is legal, valid and binding
for all purposes.

16. ENTIRE AGREEMENT.
Except as provided elsewhere herein, this Agreement sets forth the entire
agreement of the parties with respect to its subject matter and supersedes all
prior agreements, promises, covenants, arrangements, communications,
representations or warranties, whether oral or written, by any officer, employee
or representative of any party to this Agreement with respect to such subject
matter.

[Signature Page Follows]

3

---

IN WITNESS WHEREOF, the parties
hereto have caused this Agreement to be duly executed and signed as of the day
and year first above written.

| | China Information Security Technology, Inc.      
| | -------------------------------------------------
| |                                                  
| |                                                  
| |                                                  
| |                                                  
| | BY: /s/ Jiang Huai
      Lin                     
| | Jiang Huai Lin                                   
| | Chairman and Chief Executive Officer             
| |                                                  
| |                                                  
| |                                                  
| | Chief Operating Officer                          
| |                                                  
| |                                                  
| |                                                  
| | /s/ Yi Fu
      Liu                              
| | Yi Fu Liu                                        
| | Address: 21F, Everbright Bank Bldg.,             
| | Zhuzilin, Futian District, Shenzhen,
      518040
| | China                                            

---