Document:

<PAGE>
                                                                    Exhibit 4.42

                     SUMMARY OF SALE AND PURCHASE AGREEMENT
                                     BETWEEN
               BEIJING NINETOWNS TIMES ELECTRONIC COMMERCE LIMITED
                                       AND
  DAUPHIN SCIENCE BUSINESS PARK CONSTRUCTION & DEVELOPMENT CO., LTD. OF BEIJING
                       ZHONGGUANCUN FENGTAI SCIENCE PARK

CONTRACTING PARTIES

Seller:     Dauphin Science Business Park Construction & Development Co., Ltd.
            of Beijing Zhongguancun Fengtai Science Park
Purchaser:  Beijing Ninetowns Times Electronic Commerce Limited

PROPERTY DESCRIPTION

Location:   eight-storey building situated at 22-A9-2 Dao Feng Ke Ji Shangwuyuan
            Phase 2 in Fengtai

LAND USE

Industrial

CONSIDERATION

RMB14,406,744.  The Purchaser chooses to pay by lump-sum payment.

SELLER'S OBLIGATION

The Seller warrants that the Property has no title dispute. The Seller should
construct the Property in accordance with the conditions stated in the licence
for construction and planning. In the event that the Seller wishes to change the
conditions stated in the licence for construction and planning, the Seller
should obtain the written consent of the Purchaser and the approval from the
Planning Administration Department.<PAGE>
                                                                    Exhibit 4.43

               SUMMARY OF FORM OF THE SALE AND PURCHASE AGREEMENT
                                     BETWEEN
            BEIJING NINETOWNS PORTS SOFTWARE AND TECHNOLOGY CO., LTD.
                                       AND
                   BEIJING HENG FU PLAZA DEVELOPMENT CO., LTD.

CONTRACTING PARTIES

Seller:  Beijing Heng Fu Plaza Development Co., Ltd.

Purchaser:  Beijing Ninetowns Ports Software Technology Co., Ltd.

PROPERTY DESCRIPTION

Covers four floors of a building in Beijing which is being constructed by the
Seller

LAND USE

Complex

CONSIDERATION

It is provided in each Sale and Purchase Agreement entered into between the
Seller and the Purchaser.

SELLER'S OBLIGATIONS

The Seller warrants that the Property has no title dispute or debt dispute. If
the title of the Property is not able to be registered or the Property has debt
dispute due to the fault of the Seller, the Seller shall be fully responsible.
On the date of completion, the Seller should deliver certain supporting
documents to the Purchaser, such as construction work completion report.

OTHER TERMS

The Purchaser should not alter the structure or usage of the Property on its
own. Unless otherwise specified, the Purchaser has the right to use the common
areas and facilities.

Both parties should agree to the terms regarding the maintenance of the
Property, such as the maintenance scope, maintenance period and maintenance
responsibility.<PAGE>
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                                                                     EXHIBIT 4.1

  YEAR 2005 PERFORMANCE CONTRACT WITH MANAGEMENT OF PETROCHINA COMPANY LIMITED

<TABLE>

<S>                                       <C>                                             <C>
Offeree: Name:JIANG, Jiemin               Offeror: Name: CHEN, Geng                       Term of the Contract: January 1, 2005 to
                                                                                                    December 31, 2005

Title:   President of PetroChina Company  Title:   Chairman of the Board of Directors of
         Limited ("PetroChina")                            PetroChina                     Date of Execution: May 8, 2005
</TABLE>

<TABLE>
<CAPTION>
                                     KEY PERFORMANCE
             INDICES                  INDICES (KPI)        WEIGHT (%)    MEASUREMENT         TARGET           ACTUAL PERFORMANCE
-------------------------------  ------------------------  ----------  --------------  -------------------  ----------------------
<S>                              <C>                       <C>         <C>             <C>                  <C>
Profits Indices                  Rate of return of the        35              %                       13.0
                                 invested capital of
                                 PetroChina (ROIC)

                                 Net income of PetroChina     20       In million RMB               67,640
                                 (NI)

                                 Free cash flow of            15
                                 PetroChina (FCF)                      In million RMB               23,320

Operating Indices                Rate of reserves             10              %                        100
                                 replacement

                                 Unit operating cost for       5         US$/barrel                   4.57
                                 crude oil pipelines

                                 Cash processing cost for      5           RMB                       94.88
                                 per ton of oil
</TABLE>

<PAGE>

<TABLE>
<S>                              <C>                       <C>         <C>             <C>                  <C>

                                 Cash marketing cost for       5           RMB         199 (for wholesale)
                                 per ton of oil
                                                                                       150 (for retail)

                                 Gap between the actual        5             %                       +/- 5
                                 capital expenditure and
                                 budget

Indices to Be Put under Control  Quality safety and        accidents involving death < or = 0.05            Comprehensive
                                 environmental protection  persons/million man-hours;                       performance expressed
                                                                                                            in marks to be
                                                           extraordinary quality accidents capturing the    increased by 5 marks
                                                           attention of the public= 0; and                  if achieving the
                                                                                                            target of the index
                                                           extraordinary environmental pollution            put under control, and
                                                           accidents < or = 5.                              to be reduced by 5
                                                                                                            marks if failing to
                                                                                                            achieve the target of
                                                                                                            the index put under
                                                                                                            control.
</TABLE>

Signature of Offeree: JIANG Jiemin              Signature of Offeror: CHEN Geng<PAGE>

                                                                     EXHIBIT 4.2

                             CRUDE OIL MUTUAL SUPPLY
                        FRAMEWORK AGREEMENT FOR YEAR 2005

                                     BETWEEN

                           PETROCHINA COMPANY LIMITED

                                       AND

                         CHINA PETROCHEMICAL CORPORATION

                                  DECEMBER 2004

<PAGE>

            CRUDE OIL MUTUAL SUPPLY FRAMEWORK AGREEMENT FOR YEAR 2005

      PetroChina Company Limited ("PetroChina") and China Petrochemical
Corporation ("Sinopec"), following friendly consultations and on the basis of
equality, have reached this Agreement (this "Agreement") on mutual supply of
crude oil in the year of 2005.

I.    QUANTITIES AND VARIETIES OF CRUDE OIL TO BE SUPPLIED HEREUNDER

      1.    In 2005, PetroChina shall supply Sinopec with 8 million tons of
            domestic onshore crude oil, including 6 million tons of blended oil
            produced at the Daqing Oil Region, 1.30 million tons of oil produced
            at the Jizhong Oil Region, 350 thousand tons of oil produced at the
            Dagang Oil Region and 350 thousand tons of oil produced at the
            Changqing Oil Region.

      2.    In 2005, Sinopec shall supply PetroChina with 1.40 million tons of
            domestic onshore crude oil, including 500 thousand tons produced at
            the Shengli Oil Region and 900 thousand tons produced at the Tahe
            Oil Region.

      3.    The parties hereto shall, in principle, make available crude oil of
            the above supply and take delivery thereof on an evenly distributed
            basis. The quarterly mutual supply of crude oil may be adjusted as
            necessary by mutual agreement thereon and in light of the
            availability of crude oil resources, price and the State's
            macro-economic planning requirements.

II.   QUALITY OF CRUDE OIL

      Matters with respect to the quality of the crude oil to be supplied
hereunder shall be handled pursuant to applicable provisions of SY7513-88
Technical Conditions of Crude Oil at Wellhead.

III.  QUARTERLY SUPPLY AGREEMENTS; SALES AND PURCHASE CONTRACTS ON AN
      ENTERPRISE-BY-ENTERPRISE BASIS

      Quarterly supply agreements shall be entered into by and between
PetroChina Natural Gas & Pipeline Company and the Production and Management
Department of Sinopec. After the quarterly plans have been made known to their
respective subsidiaries, PetroChina's regional companies (including its oil
fields, refineries and pipeline companies) and Sinopec's subsidiaries (including
its oil fields and refineries) will enter into specific sales and purchase
contracts. The total quantities and varieties of crude oil to be supplied under
such contracts shall be consistent with those specified under the above
quarterly supply agreements.

                                        1
<PAGE>

IV.   ADDITIONAL PROVISIONS

   1. The price of crude oil to be supplied hereunder shall be settled on the
      basis of the standard crude oil price published by the National
      Development and Reform Commission each month and the crude oil premium
      mutually agreed between the parties.

   2. Payment of the price of crude oil to be supplied hereunder shall be made
      on a timely basis and pursuant to principles agreed upon by the parties
      hereto. In case of any default thereof, the parties hereto shall cooperate
      with each other in seeking a solution thereto.

   3. Where any change occurs to this Agreement in the performance hereof, it
      shall be resolved by the parties hereto through consultations.

PLANNING DEPARTMENT,                           PRODUCTION MANAGEMENT DEPARTMENT,
PETROCHINA COMPANY LIMITED                     CHINA PETROCHEMICAL CORPORATION

By: /s/ Liu Hongbin                            By: /s/ Zhang Jianhua
  -----------------------------                  -------------------------------
Date: December 1, 2004                         Date: December 1, 2004

                                       2

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