Document:

Exhibit 4.8

Exhibit 4.8

CHINA TECHFAITH WIRELESS COMMUNICATION TECHNOLOGY LIMITED

CODE OF BUSINESS CONDUCT AND ETHICS

Purpose

This Code of Business Conduct and Ethics (the “Code”) contains general guidelines for China
Techfaith Wireless Communication Technology Limited (the “Company”) to conduct its business
consistent with the highest standards of business ethics. While this Code requires a higher
standard than required by commercial practice or applicable laws, rules or regulations, the Company
commits to adhere to these higher standards.

This Code is designed to deter wrongdoing and to promote:

	•	 	honest and ethical conduct, including the ethical handling of actual or apparent conflicts
of interest between personal and professional relationships;

	•	 	full, fair, accurate, timely, and understandable disclosure of reports and documents that
the Company will file with, or submit to, the U.S. Securities and Exchange Commission (the
“SEC”) and in other public communications made by the Company;

	•	 	compliance with applicable governmental laws, rules and regulations;

	•	 	prompt internal reporting of violations of the Code; and

	•	 	accountability for adherence to the Code.

Applicability

This Code applies to all of the directors, officers, employees and advisors of the Company, whether
they work for the Company on a full-time, part-time, consultative, or temporary basis (each an
“employee” and collectively, the “employees”). Certain provisions of the Code apply specifically to
the Company’s chief executive officer, chief financial officer, controller, vice presidents and any
other persons who perform similar functions for the Company (each, a “senior officer”, and
collectively, “senior officers”).

The Board of Directors of the Company (the “Board”) has appointed Edward Zhuang as the Compliance
Officer for the Company. If you have any questions regarding the Code or would like to report any
violation of the Code, please call the Compliance Officer at (86) 10 5822-9853 or e-mail
Ethics_Email@techfaith.cn.

This Code was adopted by the Board on March 18, 2005, updated on August 12, 2006 and updated on
February 10, 2007.

Conflicts of Interest

Identifying Conflicts of Interest

A conflict of interest occurs when an employee’s private interest interferes, or appears to
interfere, in any way with the interests of the Company as a whole. You should actively avoid any
private interest that may influence your ability to act in the interests of the Company or that may
make it difficult to perform your work objectively and effectively. In general, the following
should be considered as conflicts of interest:

	•	 	Competing Business; No employee may be concurrently employed by a business that competes
with the Company or deprives it of any business.

	•	 	Corporate Opportunity; No employee should use corporate property, information or his or her
position with the Company to secure a business opportunity that would otherwise be
available to the Company. If you discover a business opportunity that is in the Company’s line
of business, through the use of the Company’s property, information or position, you must first
present the business opportunity to the Company before pursuing the opportunity in your
individual capacity.

 

 

 

	•	 	Financial Interests.

	 	(i)	 	No employee may have any financial interest (ownership or otherwise), either directly
or indirectly through a spouse or other family member, in any business entity, if such
financial interest adversely affects the employee’s performance of duties or
responsibilities to the Company, or requires the employee to devote certain time during
such employee’s working hours at the Company;

	 
	 	(ii)	 	No employee may hold any ownership interest in a privately held company that is in
competition with the Company;

	 
	 	(iii)	 	An employee may hold up to but no more than 5% ownership interest in a publicly
(traded company that is in competition with the Company;

	 
	 	(v)	 	No employee may hold any ownership interest in a company that has a business
relationship with the Company if such employee’s duties at the Company include managing or
supervising the Company’s business relations with that company. If an employee’s ownership
interest in a business entity described in clause (iii) above increases to more than 5%,
the employee must immediately report such ownership to the Compliance Officer.

	•	 	Loans or Other Financial Transactions. No employee may obtain loans or guarantees of
personal obligations from, or enter into any other personal financial transaction with, any
company that is a material customer, supplier or competitor of the Company. This guideline
does not prohibit arms-length transactions with recognized banks or other financial
institutions.

	•	 	Service on Boards and Committees; No employee should serve on a board of directors or
trustees or on a committee of any entity (whether profit or non-profit) whose interests
reasonably could be expected to conflict with those of the Company. Employees must obtain
prior approval from the Board before accepting any such board or committee position. The
Company may revisit its approval of any such position at any time to determine whether service
in such position is still appropriate.

It is difficult to list all of the ways in which a conflict of interest may arise, we have provided
only a few, limited examples. If you are faced with a difficult business decision that is not
addressed above, ask yourself the following questions:

	•	 	Is it legal?

	•	 	Is it honest and fair?

	•	 	Is it in the best interests of the Company?

Disclosure of Conflicts of Interest

The Company requires that employees fully disclose any situations that reasonably could be expected
to give rise to a conflict of interest. If you suspect that you have a conflict of interest, or
something that others could reasonably perceive as a conflict of interest, you must report it
immediately to the Compliance Officer. Conflicts of interest may only be waived by the Board, or
the appropriate committee of the Board, and will be promptly disclosed to the public to the extent
required by law.

 

 

 

Family Members and Work

The actions of family members outside the workplace may also give rise to conflicts of interest
because they may influence an employee’s objectivity in making decisions on behalf of the Company.
If a member of an employee’s family is interested in doing business with the Company, the criteria
as to whether to enter into or continue the business relationship, and the terms and conditions of
the relationship, must be no less favorable to the Company compared with those that would apply to
a non-relative seeking to do business with the Company under similar circumstances.

Employees should report any situation involving family members that could reasonably be expected to
give rise to a conflict of interest to their supervisor or the Compliance Officer. For purposes of
this Code, “family members” or “members of your family” include your spouse, brothers, sisters and
parents, in-laws and children.

Gifts and Entertainment

The giving and receiving of gifts is common business practice. Appropriate business gifts and
entertainment are welcome courtesies designed to build relationships and understanding among
business partners. However, gifts and entertainment should never compromise, or appear to
compromise, your ability to make objective and fair business decisions.

It is the responsibility of employees to use good judgment in this area. As a general rule,
employees may give or receive gifts or entertainment to or from customers or suppliers only if the
gift or entertainment could not be viewed as an inducement to any particular business decision. All
gifts and entertainment expenses made on behalf of the Company must be properly accounted for on
expense reports. Employees may only accept appropriate gifts. We encourage employees to submit
gifts they received to the Company. While it is not mandatory to submit small gifts, gifts of over
RMB200 must be submitted immediately to the administration department of the Company.

The Company’s business conduct is founded on the principle of “fair transaction.” Therefore, no
employee may receive kickbacks, bribe others, or secretly receive commissions or any other personal
benefits.

Protection and Use of Company Assets

Employees should protect the Company’s assets and ensure their efficient use for legitimate
business purposes only. Theft, carelessness and waste have a direct impact on the Company’s
profitability. The use of the funds or assets of the Company, whether for personal gain or not, for
any unlawful or improper purpose is strictly prohibited.

To ensure the protection and proper use of the Company’s assets, each employee should:

	•	 	Exercise reasonable care to prevent theft, damage or misuse of Company property;

	•	 	Promptly report the actual or suspected theft, damage or misuse of Company property;

	•	 	Safeguard all electronic programs, data, communications and written materials from
inadvertent access by others; and

	•	 	Use Company property only for legitimate business purposes.

 

 

 

Fair business practices

To fair business practices, employee should:

Give the equal opportunity to any supplier;

Protect all data of customer and supplier;

Protection and Use of the third party (including but not limited to the customer, supplier etc)
Intellectual Property (“IP”)

Employees should protect the third party (including but not limited to the customer, supplier etc)
IP.

To ensure the protection and proper use of the IP, each employee should:

Not use the IP or any part of it for any purpose other than the Company Purpose;

Not disclose the IP or any part thereof to any person other than an Authorised Person;

Not take any copies or make any summaries or transcripts of the whole or any part of the IP without
getting the approval from the Company;

Notify the Company immediately it becomes aware that any IP has been disclosed to or is in the
possession of any person who is not an Authorised Person;

Keep all IP in a safe and secure place and shall treat all IP in a manner which is no less secure
than the manner in which it treats its own confidential and/or proprietary information and at least
with reasonable care;

Intellectual Property and Confidentiality

	•	 	All inventions, creative works, computer software, and technical or trade secrets developed
by an employee in the course of performing the employee’s duties or primarily through the use
of the Company’s materials and technical resources while working at the Company, shall be the
property of the Company.

	•	 	The Company maintains a strict confidentiality policy. During an employee’s term of
employment, the employee shall comply with any and all written or unwritten rules and policies
concerning confidentiality and shall fulfill the duties and responsibilities concerning
confidentiality applicable to the employee.

	•	 	In addition to fulfilling the responsibilities associated with his position in the Company,
an employee shall not, without first obtaining approval from the Company, disclose, announce
or publish trade secrets or other confidential business information of the Company, nor shall
an employee use such confidential information outside the course of his duties to the Company.

	•	 	Even outside the work environment, an employee must maintain vigilance and refrain from
disclosing important information regarding the Company or its business, customers or
employees.

	•	 	An employee’s duty of confidentiality with respect to the confidential information of the
Company survives the termination of such employee’s employment with the Company for any
reason, until such time as the Company discloses such information publicly or the information
otherwise becomes available in the public sphere through no fault of the employee.

	•	 	Upon termination of employment, or at such time as the Company requests, an employee must
return to the Company all of its property without exception, including all forms of medium
containing confidential information, and may not retain duplicate materials.

 

 

 

Accuracy of Financial Reports and Other Public Communications

As a public listed company, the Company is required to report its financial results and other
material information about its business to the public and the SEC. It is the Company’s policy to
promptly disclose accurate and complete information regarding its business, financial condition and
results of operations.

Employees must strictly comply with all applicable standards, laws, regulations and policies for
accounting and financial reporting of transactions, estimates and forecasts. Inaccurate, incomplete
or untimely reporting will not be tolerated and can severely damage the Company and result in legal
liability.

Employees should be on guard for, and promptly report, any possibility of inaccurate or incomplete
financial reporting. Particular attention should be paid to:

	•	 	Financial results that seem inconsistent with the performance of the underlying business;

	•	 	Transactions that do not seem to have an obvious business purpose; and

	•	 	Requests to circumvent ordinary review and approval procedures.

The Company’s senior financial officers and other employees working in the Finance Department have
a special responsibility to ensure that all of the Company’s financial disclosures are full, fair,
accurate, timely and understandable. Any practice or situation that might undermine this objective
should be reported to the Compliance Officer.

Company Records

Accurate and reliable records are crucial to the Company’s business and form the basis of its
earnings statements, financial reports and other disclosures to the public. The Company’s records
are the source of essential data that guides business decision-making and strategic planning.
Company records include, but are not limited to, booking information, payroll, timecards, travel
and expense reports, e-mails, accounting and financial data, measurement and performance records,
electronic data files and all other records maintained in the ordinary course of our business.

All Company records must be complete, accurate and reliable in all material respects. There is
never an acceptable reason to make false or misleading entries. Undisclosed or unrecorded funds,
payments or receipts are strictly prohibited. You are responsible for understanding and complying
with the Company’s record keeping policy. Contact the Compliance Officer if you have any questions
regarding the record keeping policy.

Compliance with Laws and Regulations

Each employee has an obligation to comply with the laws of the cities, provinces, regions and
countries in which the Company operates. This includes, without limitation, laws covering
commercial bribery and kickbacks, copyrights, trademarks and trade secrets, information privacy,
insider trading, offering or receiving gratuities, employee harassment, occupational health and
safety, false or misleading financial information or misuse of corporate assets.

Employees are expected to understand and comply with all laws, rules and regulations that apply to
your position at the Company. If any doubt exists about whether a course of action is lawful, you
should seek advice immediately from the Compliance Officer.

 

 

 

Violations of the Code

All employees have a duty to report any known or suspected violation of this Code, including any
violation of laws, rules, regulations or policies that apply to the Company.

Reporting a known or suspected violation of this Code by others will not be considered an act of
disloyalty, but an action to safeguard the reputation and integrity of the Company and its
employees.

If you know of or suspect a violation of this Code, it is your responsibility to immediately report
the violation to the Compliance Officer, who will work with you to investigate your concern. All
questions and reports of known or suspected violations of this Code will be treated with
sensitivity and discretion. The Compliance Officer and the Company will protect your
confidentiality to the extent possible, consistent with the law and the Company’s need to
investigate your concern.

It is the Company’s policy that any employee who violates this Code, be subject to appropriate
discipline, including termination of employment, based upon the facts and circumstances of each
particular situation. Your conduct as an employee of the Company, if not in compliance with the law
or with this Code, can result in serious consequences for both you and the Company.

The Company strictly prohibits retaliation against an employee who, in good faith, seeks help or
reports known or suspected violations. An employee inflicting reprisal or retaliation against
another employee for reporting a known or suspected violation will be subject to disciplinary
action up to and including termination of employment.

Waivers of the Code

Waivers of this Code will be granted on a case-by-case basis and only in extraordinary
circumstances. Waivers to this Code may be made only by the Board, or the appropriate committee of
the Board, and will be promptly disclosed to the public.

Conclusion

This Code of Business Conduct and Ethics contains general guidelines for conducting the business of
the Company consistent with the highest standards of business ethics. If you have any questions
about these guidelines, please contact the Compliance Officer.

We expect all employees to adhere to these standards. Each employee is separately responsible for
his or her actions.

Conduct that violates the law or this Code cannot be justified by claiming that it was ordered by a
supervisor or someone in higher management. If you engage in conduct prohibited by the law or this
Code, you will be deemed to have acted outside the scope of your employment. Such conduct will
subject you to disciplinary action, including termination of employment.

* * * * * * * * * * * * *

 

 

 

CERTIFICATION OF COMPLIANCE

TO: Compliance Officer

FROM:                                                             

RE: Code of Business Conduct and Ethics of China Techfaith Wireless Communication Technology
Limited (Adopted on March 18, 2005)

I have received, reviewed, and understand the above-referenced Code of Business Conduct and Ethics
(the “Code”) and hereby undertake, as a condition to my present and continued employment at or
association with China Techfaith Wireless Communication Technology Limited and/or any of its
affiliated entities, (collectively “Techfaith”), to comply fully with the Code.

I hereby certify that I have adhered to the Code during the period that I have been associated with
Techfaith.

I agree to adhere to the Code in the future.

	 	 	 
	 

Name:

	 	 

                                        , 200__

DateEX-4.1 Loan Agreement, dated Decmeber 3, 2008.

Exhibit 4.1

(Translation)

LOAN AGREEMENT

SN Kosan Ltd. (the “Borrower”) and NIDEC CORPORATION (the “Lender”) hereby enter into this
agreement (this “Agreement”) in regard to a JPY 14,500,000,000 loan extended by the Lender to the
Borrower, as follows:

Article 1

Pursuant to the provisions of this Agreement, the Lender undertakes to the Borrower to lend the
Borrower JPY 14,500,000,000 to be used as the Borrower’s working capital no later than December 19,
2008, and the Borrower will borrow the said amount.

Article 2

	1.	 	The repayment deadline shall be full five years after the loan execution date.
	 
	2.	 	The Borrower may, from time to time, make repayment(s) prior to the repayment deadline, and
shall make full repayment before the repayment deadline.
	 
	3.	 	Notwithstanding the foregoing paragraph, if any outstanding debt remains at the repayment
deadline, the Borrower shall repay the Lender at once any remaining amount at the repayment
deadline.

Article 3

The interest rate shall be 2.4% per annum, and the Borrower shall pay the lender such interest
every three months.

Article 4

	1.	 	In the event any of the following events becomes applicable to the Borrower, even if there is
no demand notice from the Lender, the Borrower’s obligation shall automatically become due and
payable, and the Borrower shall immediately pay the principle and the interest:

	 	(1)	 	if the Borrower once fails to pay any interest provided in Article 3;
	 
	 	(2)	 	if the Borrower is subject to any provisional seizure, provisional
disposition or compulsory execution in regard to other debts;
	 
	 	(3)	 	if the Borrower dishonors any bill or becomes insolvent;
	 
	 	(4)	 	if the Borrower files or has filed against it an application for
bankruptcy, civil rehabilitation, corporate reorganization and the like;
	 
	 	(5)	 	if the Borrower undergoes dissolution, merger, corporate split or if
there is any material change in the shareholder composition in the Borrower;
	 
	 	(6)	 	if the Lender judges there is any deterioration (or any fear of
deterioration) in the

 

Exhibit 4.1

(Translation)

	 	 	 	financial status of the Borrower; or
	 
	 	(7)	 	if the Borrower violates any provision of this Agreement.

Article 5

After the repayment deadline or when the Borrower’s obligations becomes due and payable, the
Borrower shall pay to the Lender default interest on the remaining principal, at the rate of 15%
per annum until its full repayment.

Article 6

	1.	 	The jointly and severally responsible guarantor, Shigenobu Nagamori, shall guaranty the
Lender, jointly and severally along with the Borrower, the Borrower’s debt to the Lender
provided in this Agreement.
	 
	2.	 	In order to secure any and all debts of the Borrower to the Lender, which is made under this
Agreement, the jointly and severally responsible guarantor shall create a pledge to the
4,500,000 shares of the Lender’s shares that such jointly and severally responsible guarantor
owns.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed in one copy,
affixing the respective name (signature) and seal of the Borrower, the Lender and the jointly and
severally responsible guarantor, and the Lender retains the original and the Borrower and jointly
and severally responsible guarantor retains copies thereof.

December      3     , 2008

The Borrower:

518 Akinono-cho, Nijo-sagaru, Karasuma-dori, Nakagyo-ku, Kyoto

SN Kosan Ltd.

Sumiko Nagamori

Chairman of the Board, President Chief Executive Officer [Seal]

The Lender:

338 Kuzetonoshiro-cho, Minami-ku, Kyoto

NIDEC CORPORATION

Shigenobu Nagamori,

Chairman of the Board, President & Chief Executive Officer [Seal]

The jointly and severally responsible guarantor:

2-27, Oe Tsukahara-cho, Nishikyo-ku, Kyoto

Shigenobu Nagamori [Seal]

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