Document:

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                                                                   EXHIBIT 10.57

                         LEASE AGREEMENT OF MODERN CITY

This Agreement is made by the following three parties in Haidian District,
Beijing:

<TABLE>
<S>                        <C>
Property Owner:             HAO ZHANGANG, HAO JIANING, MENG CAIXIA  (the
                            "Owner" )
Identification card number: Hao Zhangang: 110101620910257
                            Meng Caixia:  320302640319324
                            Hao Jianing:   No identification card
Domicile:                   1/F Blue Sky Office Building, No.58 Fengtai Road,
                            Fengtai District, Beijing

Lessor:                     BEIJING BLUE SKY YUNDA TECHNOLOGY DEVELOPMENT CO.,
                            LTD. ("Party A")
Registration Number:        1101062178142 (1--1)
Legal address:              Blue Sky Office Building, No.58 Fengtai Road, Fengtai
                            District, Beijing
Legal Representative:       Hao zhangang

Lessee:                     BEIJING STONE RICH SIGHT INFORMATION TECHNOLOGY CO., LTD.
                            ("Party B")
Registration number:        Qi He Jing Zong Fu Zi No.006990
Registered address:         No.1, Wanquan Villege, Haidian District, Beijing City
Legal Representative:       Mao daolin
</TABLE>

The three parties hereto, based on the principle of equality and mutual benefit,
made the following agreements in relation to property lease through friendly
negotiation:

1.   PROPERTY LEASE

1.1  The Owner agrees to entrust Party A to lease the property situated on 16/F
     Block C Part A of SOHO Modern City, No.88 Jianguo Road, Chaoyang District,
     Beijing, China ("Leased Property") to Party B for the use of office only.
     The gross floor area of the Leased Property is 1943.38 square meters, and
     the inside floor area is 1390.88 square meters.

1.2  The location of the Leased Property is specified in the Floor Map and
     Construction Drawing of the Leased Property attached hereto as Schedule I.

2.   TERM

2.1  The term of the lease is two years, from January 15, 2002 to January 15,
     2004. During the term of the lease, the first seventy-six days from 15th
     January 2002 to 1st April 2002 are free of rent and property management
     fees.

2.2  Party B is entitled to request an extension of the term during the three
     months immediately before the expiry of the term. Upon the agreement of the
     parties hereto,

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     Party has the priority over any third person in leasing the Leased Property
     based on the same conditions and terms.

3.   RENT

3.1  The rent is US$15 per square meter (gross floor area) per month, including
     property management fees, totaling US$29150.7 per month.

3.2  The rent is due and payable each month. Party A shall issue to Party B the
     formal invoice specifying the amount of the rent of this month on Wednesday
     of the first week of each month. Upon receipt of the invoice, Party B shall
     pay the rent of this month by cheque on Thursday on the first week of each
     month. The exchange rate between US dollars and Renminbi is the relevant
     middle rate published by Bank of China on the payment date (or the day
     before the payment date if no exchange rate is published on the payment
     date).

4.   DEPOSIT

4.1  Party B shall pay to Party A within 7 business days an amount equal to the
     rent (including property management fees) of two months as deposit,
     totaling US$58301.4.

4.2  Party A shall refund the deposit to Party B, without interest, within 15
     business days after the termination of this Agreement, provided that all
     fees due by Party B has been paid and the Lease Property is returned to
     Party A.

5.   PENALTY

5.1  If Party B fails to pay rent in accordance with this Agreement within the
     specified period of time, Party A is entitled to assess a penalty of 0.5ie
     of the amount due but unpaid per day.

5.2  Party B shall not pay any penalty if the delay of payment is due to the
     delay of Party A in issuing invoice or other reasons attributable to
     Party A.

6.   USE OF THE LEASED PROPERTY

6.1  Party B shall be entitled to reasonably use the Leased Property in
     accordance with this Agreement, and, the Owner and Party A warrant that
     Party B is entitled to use the public area and public facilities of SOHO
     Modern City ("Mansion") free of charge, provided that Party B shall comply
     with the management regulations provided by the property manager in
     relation to the public facilities of the Mansion (limited to those
     consented to by Party B in writing).

6.2  The Owner has the right to sell the Leased Property, however, the right of
     Party B to use the Leased Property provided herein shall not be affected no
     matter how the Owner disposes of the Leased Property. Otherwise, the Owner
     shall be deemed as having defaulted under this Agreement.

6.3  Party A agrees that Party B may allocate all or part of the Leased Property
     for its affiliated companies to use, but Party B remains as the Lessee. The
     affiliated companies of Party

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     B have the same right to use the Leased Property as Party B. Party B's
     affiliated companies include: Beijing Sina Interactive Information Service
     Co., Ltd., Beijing Sina Interactive Advertising Co., Ltd., Guangdong Sina
     Interactive Information Service Co., Ltd. and other companies which Party B
     notifies Party A in advance and in writing.

6.4  Except for the provisions above, Party B shall not sublet all or any of the
     Leased Property to any third person without the prior consents in writing
     of Party A.

6.5  During the term of the lease, Party A shall not interferes with, and
     guarantee that no third person shall interferes with, the use and enjoyment
     of Party B of the Leased Property unless justified by a reason, provided
     that Party B does not default in rent payment.

6.6  Without the consent in writing of Party B, Party A shall not install any
     objects or facilities in the vicinity of the Leased Property, which shall
     affect the enjoyment of sunshine or sight of Party B, including but not
     limited scroll, neon lights, advertising board, lampshade, lights and
     decoration. If the developer of the Mansion, property manager or any third
     person takes similar actions, Party A shall be responsible to prevent such
     actions from taking place. Otherwise, the rent shall be lowered or Party A
     shall compensate the losses of Party B.

6.7  Party A agrees that Party B may make reasonable decoration and change the
     route of the power supplying lines, air conditioning system, fire fighting
     system, but all relevant costs shall be born solely by Party B.

6.8  Upon the prior consent of Party B, Party A or its authorized
     representatives may enter the Leased Property at appropriate time and after
     having served reasonable notice. Except on occasions of fire fighting or
     other emergency, the entering into the Leased Property shall not affect the
     normal business of Party B.

6.9  During the three months immediately before the expiry of this Agreement,
     Party A and any other third person intending to lease the Leased Property
     accompanied by Party A may access to and inspect the Leased Property upon
     the prior consent of Party B, provided that the normal business of Party B
     shall not be affected by such accession and inspection.

7.   MAINTENANCE AND REPARATION

7.1  During the term of the lease, Party A shall be responsible for the
     maintenance and reparation of the major construction structure, walls,
     drainage facilities, pipelines and cables in accordance with relevant laws
     and regulations.

7.2  If the damage to the major construction structure, walls, drainage
     facilities, pipelines and cables is caused by Party B willfully or
     negligently, Party B shall be responsible for the reparation.

8.   AREA OF THE LEASED PROPERTY

8.1  The floor area of the Leased Property which is the base to calculate the
     rent shall be the floor area of the Leased Property surveyed by Beijing
     municipal housing authorities or other authorities authorized by the
     municipal government. If there is discrepancy between the floor area of the
     Leased Property surveyed by Beijing municipal housing

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     authorities or other authorities authorized by the municipal government and
     the floor area provided in Article 1 of this Agreement, the rent shall be
     calculated in accordance with the first one and appropriate adjustment of
     rent shall be made if necessary.

8.2  If the floor area surveyed by Beijing municipal housing authorities or
     other authorities authorized by the municipal government is smaller than
     the floor area provided in Article 1 of this Agreement, Party A shall
     refund the extra rent to Party A within 5 business days after the surveyed
     floor area is available or apply the extra rent to the rent payable
     afterwards. If the surveyed floor area is larger than the floor area
     provided in this Agreement, Party B shall be pay the balance.

9.   RETURN OF THE LEASED PROPERTY

9.1  Party B shall return the Leased Property to Party A upon the termination of
     this Agreement. If there is no material damage to the Leased Property,
     Party B may not revert the Leased Property to its original condition.

10.  Representations, Undertakings and Warranties

10.1 The parties hereto represents, undertakes and warrants to each other that:

(1)  it is a company duly established and validly existing;

(2)  it has all necessary capacity to conduct the transaction contemplated
     herein, and such transaction is within its business scope;

(3)  it has all necessary power and rights to sign this Agreement, and its
     authorized representative has obtained due authority to sign this Agreement
     on its behalf;

(4)  it has the ability to perform the obligations provided herein, and such
     performance is not in violation of any laws or regulations which are
     applicable to it;

(5)  it has not entered into any liquidation, dissolution or bankruptcy process.

10.2 The Owner warrants that it has the integral ownership right to the Leased
     Property.

10.3 The Owner and Party Warrant that all necessary governmental approvals
     applicable to the Leased Property have been or shall be obtained, the use
     of the Mansion as office is in compliance with relevant laws and
     regulations, and can satisfy the need of Party B for its normal business.

11.  DEFAULT

11.1 If any party ("Defaulting Party") defaults against any of its obligations
     or fails to timely and completely perform its obligations provided herein,
     the other party ("Non-defaulting Party) is entitled to demand the
     Defaulting Party to rectify its defaults and take sufficient, effective and
     timely remedial actions to eliminate the aftermath of default, and make
     full compensation for the losses of Non-defaulting Party attributable to
     such defaults.

11.2 Upon the occurrence of default, if it is deemed to be impossible or unfair
     for the Non-defaulting Party to continue to perform its obligations
     provided herein upon the reasonable and objective judgment, the
     Non-defaulting Party is entitled to suspend its performance of the
     obligations and notify the Defaulting Party of such suspension until the
     defaults are stopped and sufficient, effective and timely remedial actions
     are taken by

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     Party A to eliminate the aftermath of the defaults and compensation is made
     to compensate the losses of the Non-defaulting Party.

11.3 The losses of the Non-defaulting Party to be compensated by the Defaulting
     Party include any direct losses and foreseeable indirect losses and costs
     incurred including but not limited to fees payable to legal counsel, court
     or arbitration fees, financial costs and transportation fares and room and
     board fees.

12.  FORCE MAJEUR

12.1 Force Majeur means any event which can not be controlled, foreseen or
     prevented by using reasonable efforts, and affects and delays the
     performance of any party hereto of all or part of its obligations. Such an
     event includes but not limited governmental decisions, natural disaster,
     war and any other similar event.

12.2 Any party which is affected by force majeur shall inform the other parties
     of the situation as soon as practical.

12.3 Any party which is affected by force majeur may suspend the performance of
     its obligations until the influence of the force majeur event is
     eliminated, and shall not be deemed as defaulting, provided that the
     affected party shall provide to other parties the certificate issued by
     relevant notary public or other appropriate entities attesting the
     occurrence of the force majeur event. Without such a certificate, other
     parties may hold the affected party liable for defaulting.

12.4 Each party shall exert its utmost efforts to alleviate or eliminate the
     aftermath of the force majeur event upon its occurrence. If any party fails
     to perform this obligation, this party shall be liable for losses which
     could have been prevented.

12.5 If the force majeur event affects any party to perform its obligations for
     consecutive 15 days or 30 days in accumulation, the parties shall consult
     with each other on the continuous performance of the obligations. If the
     parties cannot reach an agreement, any party may terminate this Agreement.

13.  EFFECTIVENESS, AMENDMENT AND TERMINATION

13.1 This Agreement becomes effective upon the signatures and common seals of
     the parties.

13.2 Upon the occurrence of any of the following event, other parties may
     unilaterally terminate this Agreement in writing:

(1)  one party defaults, and the Defaulting Party fails to rectify the defaults
     or take sufficient, effective and timely remedial actions to eliminate the
     aftermath of the defaults and compensate the losses of the Non-defaulting
     Party attributable to such defaults;

(2)  one party bankrupts or enters into liquidation process, and the process is
     not terminated within seven days;

(3)  one party cannot perform the obligations due to influence of force majeur
     for over 10 days.

13.3 Upon the following actions of Party B, Party A is entitled to unilaterally
     terminate this

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     Agreement:

(1)  conducting illegal business activities in violation of laws or regulations;

(2)  changing the use of the Leased Property without the consent of Party A; or,
     without the consent of Party A subletting all or part of the Leased
     Property or allowing any third party to use or co-use the Leased Property
     (excluding the affiliated companies of Party B).

13.4 If Party B cannot use or enjoy the Leased Property and the Mansion due to
     force majeur events or events not attributable to Party A (excluding the
     damage directly or indirectly caused the willful or negligent actions of
     Party B during the term of the lease), Party B is entitled to terminate
     this Agreement and notify Party A of the termination. Upon the termination,
     Party A shall refund the deposit and rent paid in advance.

13.5 The termination prior to the expiry of the term of the lease shall not
     affect any party's rights and obligations arising before the termination of
     this Agreement.

14.  NOTICE

14.1 Any notice from one party to other parties in relation to this Agreement
     shall be in writing and delivered by hand, fax, telegraph, telefax, email,
     or pre-paid mail or courier. If delivered by hand, fax, telegraph, telefax
     or email, the notice is deemed to reach the addresses on the date of
     dispatch; if delivered by pre-paid mail or courier, the notice is deemed to
     reach the addresses on the third day after the dispatch.

14.2 Each notice shall be delivered to the addresses mentioned in the first part
     of this Agreement unless these addresses are changed by the relevant party
     by a written notice.

15.  DISPUTE RESOLUTION

15.1 If any dispute arises out of this Agreement in terms of its interpretation
     and performance, the parties shall resolve the dispute through consultation
     in good faith.

15.2 If the parties cannot reach an agreement regarding the dispute, the parties
     shall submit the dispute to China International Trade and Economic
     Arbitration Commission for arbitration in accordance with its then
     effective arbitral rules. The arbitration shall take place in Beijing in
     Chinese language. The arbitral award shall be final and binding upon all
     parties.

15.3 The signing, effect, performance and interpretation as well as dispute
     resolution are governed by Chinese laws.

16.  OTHER PROVISIONS

16.1 This Agreement is executed in three original copies, each party holding one
     copy. Each original copy has the equal binding effect.

16.2 The Owner agrees that if Party A fails to perform its obligations provided
     herein disregarding any cause of such failure, the Owner shall perform
     these obligations, and shall be jointly and severally liable to Party B.

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16.3 The parties may amend this Agreement in writing. The amendment and
     supplemental agreements are integral parts of this Agreement, having equal
     binding effect with this Agreement.

16.4 If any provision of this Agreement becomes wholly or partially invalid or
     unenforceable due to contradicting with laws or governmental rules or other
     reasons, such provision is deemed having been deleted. However, the
     deletion of such provision shall not affect the validity of other
     provisions.

16.5 Unless provided otherwise, any omission or delay in exercising any right,
     power or privilege provided herein shall not be deemed to be a waiver of
     such right, power or privilege. Specific or partial exercise of any right,
     power or privilege shall not affect the exercise of other right, power or
     privilege.

16.6 This Agreement constitutes the whole agreement between the parties
     regarding the lease of the Leased Property, and supersedes any oral and
     written agreement, understanding and communication regarding the lease of
     the Leased Property reached prior or at the same time as this Agreement.
     Unless expressly provided in this Agreement, there is no express or implied
     obligations or undertakings among the parties hereto.

16.7 No party is entitled to terminate this Agreement prior to the expiry of the
     term of the Lease unless as provided in this Agreement and the schedules.

16.8 The following documents are integral schedules to, with equal binding
     effect as this Agreement: (i) the Floor Map and Construction Drawing of the
     Leased Property; (ii) the Supplemental Agreement of the Modern City Lease
     Agreement.

Owner:  HAO Zhangang, HAO Jianing, MENG Caixia

Signatures:          /s/
                ---------------------

Date: January 2002

Lessor:  Beijing Blue Sky Yunda Technology Development Co., Ltd.

Authorized representative:           /s/
                                ---------------

Date: January 2002

Lessee:  Beijing Stone Rich Sight Information Technology Co., Ltd.

Authorized representative:           /s/
                                --------------------

Date: January 2002

                                       7<PAGE>

                                                                   EXHIBIT 10.58

          SUPPLEMENTAL AGREEMENT TO THE LEASE AGREEMENT OF MODERN CITY

Party A:                   HAO ZHANGANG, HAO JIANING, MENG CAIXIA
                           (Collectively, "Owner")

Number of Identity Cards:  HAO Zhangang: 110101620910257
                           MENG Caixia:  320302640319324
                           HAO Jianing:  NO IC card
Domicile:                  1st Floor, Blue Sky Office Building, 58 Fengtai Road,
                           Fengtai District, Beijing.

Party B:                   BEIJING BLUE SKY YUNDA TECHNOLOGY DEVELOPMENT
                           CO., LTD. ("Lessor")
Registration Number:       1101062178142 (1-1)
Registered Address:        Blue Sky Office Building, 58 Fengtai Road, Fengtai
                           District, Beijing
Legal Representative:      HAO Zhangang

Party C:                   BEIJING STONE RICH SIGHT INFORMATION TECHNOLOGY
                           CO., LTD. ("Lessee")

Registration Number:       Qi He Jing Zong Fu Zi NO. 006990
Registered Number:         A1 Wanquanzhuang, Haidian District, Beijing
Legal Representative:      MAO Daolin

Party D:                   SCITE INTERNATIONAL PROPERTY MANAGEMENT CO., LTD.
                           BEIJING SCITE MODERN BRANCH ("Property Manager")
Registered Address:        SOHO Modern City, 88 Jianguo Road, Chaoyang District

WHEREAS:

The Owner, Lessor and Lessee have entered into the Lease Agreement of Modern
City ("Lease Agreement"). In accordance with the Lease Agreement, the Lessor and
Owner lease the office unit on 16th floor of Block C, Party A of SOHO Modern
City, 88 Jianguo Road, Chaoyang District, Beijing, China. The lease property is
managed by the Property Manager. To specify the rights and obligations of all
relevant parties in relation to the use and management of the lease property,
after friendly consultation, the relevant parties have reached the following
agreement:

1.   The Owner and Lessor have agreed that the Lessee, as the user of the lease
     property, has the same right to use the lease property as that of the Owner
     during the term of the lease. The right to use the lease property herein
     includes but not limited to the rights of property owners stipulated in the
     Covenants of Use, Management and Maintenance of SOHO Modern City Property,
     approved by

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     Beijing Municipal Bureau of House and Land Administration with the approval
     number of Wai Zi No.148, attached herewith as Schedule I, excluding the
     ownership right, the right to dispose of the property and the right to
     benefit from the property.

2.   All the parties hereto have agreed that the Lessee, as the user of the
     lease property, has the same right to enjoy property management services of
     the lease property as that of the Owner during the term of the lease. The
     property management services herein includes but not limited to the
     services contained in the Service Guide attached herewith as Schedule II
     and the Network Service Guide of SOHO Modern City attached herewith as
     Schedule III. The Property Manager warrants and undertakes that usual and
     continuous property management services will be provided to the Lessee from
     the date on which the Lessee occupies the lease property.

3.   In addition to the property management services, the Owner, Lessor and
     Property Manager agree to provide the following extra services:

     (1)  to cooperate with the Lessee and provide necessary conditions for
          decoration of the lease property;

     (2)  to install separate electricity meter free of charge;

     (3)  to supply power not lower than 70 KW, and provide necessary assistance
          for Lessee's internal power supply system;

     (4)  to provide all necessary assistance and cooperation in applying for
          and maintaining separate and independent lines;

     (5)  to provide all necessary assistance and cooperation in applying for,
          using and maintaining direct-dial telephone lines, trunk lines,
          internal telephone networks and Intranet.

4.   The fees payable for the services to be provided not free of charges by the
     Property Manager in addition to those covered by property management fees,
     shall be paid directly to the Property Manager based on the actual
     services. Power bills, telephone bills and other telecommunication bills
     shall be paid directly to the relevant authorities.

5.   If the Owner, Lessor and Property Manager default against their respective
     obligations, the Lessee is entitled to demand specific performance from the
     defaulting party. If within ten days after the Lessee's demand, the
     defaulting party fails to rectify its defaults or fails to take sufficient,
     effective and timely remedial actions and to fully compensate the Lessee
     for its losses attributable to the defaults, the Lessee is entitled to
     demand a deduction in relevant amount from the property management fees
     included in the rent. If the dispute is not reasonably and appropriately
     resolved, the Lessee is entitled to unilaterally terminate the Lease
     Agreement, and reserve the right to seek compensation.

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6.   The Owner, Lessor and Lessee have agreed that this agreement is the
     supplemental agreement to the Lease Agreement, having equal binding effect
     with the Lease Agreement.

7.   This supplemental agreement becomes effective upon the signatures of all
     the parties hereto, and terminates upon the termination of the Lease
     Agreement.

Owner:  HAO Zhangang, HAO Jianing, MENG Caixia

Signatures:          /s/
                ---------------

Date: January 2002

Lessor: Beijing Blue Sky Yunda Technology Development Co., Ltd.

Authorized representative:          /s/
                               ----------------

Date: January 2002

Lessee:    Beijing Stone Rich Sight Information Technology Co., Ltd.

Authorized representative:          /s/
                               ----------------

Date: January 2002

Property Manager: Scite International Property Management Co., Ltd. Beijing
Scite Modern Branch

Authorized representative:          /s/
                               ----------------

Date: January 2002

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