Must the employing unit sign the open-ended labor contract with the long-term (more than 10 years) sick leave employee?

用人单位是否必须与满十年的长病假员工签订无固定期限劳动合同？

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Homeowners typically sign a long-term contract of 15 to 20 years with the companies that pay for solar equipment and labor and make sure the solar panels work properly during the lifetime of the contract.

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