system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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3. Party B's Services Party B undertakes to provide the following technical consultancy and services to Party A and its subsidiaries in respect of the cooperative business (collectively referred to as "Party B's Services"): 3.1 Research, development, production, test, operation and maintenance, upgrade and other services of relevant technology; 3.2 Development, construction, operation and maintenance, upgrade and other services of relevant internet platform and system; 3.3 Design the relevant tour products plan, and provide relevant training, implementation and upgrade and other services; 3.4 Consultancy services related to sale and promotion of tour products; 3.5 Other services as agreed by the Parties. Party A agrees that Party B may, at its own discretion, provide the aforementioned Party B's Services to Party A and its subsidiaries, or purchase the required services from any third party and provide the services to Party A and its subsidiaries. Party A shall cause its subsidiaries to accept Party B's Services. The Parties agree that the subsidiaries of Party A may otherwise enter into an agreement with Party B in respect of Party B's Services in accordance with this Agreement. 4. Cooperation Remuneration 4.1 Party A and Party B unanimously agree that they will allocate the proceeds generated from cooperation in accordance with thefollowing provisions: Party B shall have the right to charge, on a quarterly basis, the service fee ("Service Fee") from Party A or its subsidiaries who have accepted Party B's Services, or designate another person to charge Service Fee from Party A or its subsidiaries who have accepted Party B's Services. The total sum of Service Fee shall be equal to the amount of profits gained by Party A or its subsidiaries who have accepted Party B's Services. Party B shall have the right to adjust the amount of Service Fee at its own discretion, without the prior consent of Party A or its subsidiaries. Party A shall cause its subsidiaries to pay the Service Fee in respect of Party B's Services provided to such subsidiaries. 4.2 The Service Fee of the last quarter shall be paid prior to the seventh business day following the commencement of the next quarter. Such Service Fee shall be paid to the bank account designated by Party B in writing. If Party B intends to change its bank account, it shall send a written notice to Party A seven business days in advance. 4.3 Except as otherwise agreed hereunder, if Party A or its subsidiaries fail to pay the Service Fee in full on schedule according to provisions of Article 4.1 and Article 4.2, then Party A or its subsidiaries shall, in addition to the continuance of the payment of Service Fee in full, it shall pay Party B the liquidated damages at a daily interest rate of 0.03% in respect of the outstanding Service Fee. 5. Term of Cooperation Party A and Party B agree and confirm that the term of cooperation under this Agreement shall commence from the execution date hereof and end on the expiration date of the operation term of Party B ("Term of Cooperation"). 6. Termination 6.1 Prior to the expiration of the Term of Cooperation , this Agreement shall only be terminated upon occurrence of the followingcircumstances: 6.1.1 Party B shall have the right to terminate this Agreement in advance without the prior written consent from Party A, bysending a written notice to Party A but Party A may not terminate or rescind this Agreement; 6.1.2 One Party requests to terminate this Agreement when the other Party is declared bankrupt in accordance with the laws; 6.1.3 Party B fails to provide Party B's Services to Party A for more than three consecutive years due to the force majeure event. 6.2 Rights and Obligations of the Parties upon Termination 6.2.1 If this Agreement is terminated according to the aforementioned Article 6.1.1, neither Party shall assume any obligations or liabilities to the other Party as of the termination hereof, unless as otherwise agreed by the Parties, provided that the liabilities for breach occurring prior to the termination shall not be exempted; 6.2.2 If this Agreement is terminated according to the aforementioned Article 6.1.2, the rights and obligations of the Parties at thetime of termination hereof shall be subject to the relevant bankruptcy laws; 6.2.3 If this Agreement is terminated according to the aforementioned Article 6.1.3, neither Party shall assume any obligations or liabilities to the other Party as of the termination hereof, provided that the liabilities for breach that occured prior to the force
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Extract the exact clause related to "Exclusivity" from the excerpt above.