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第七百八十三条 定作人未向承揽人支付报酬或者材料费等价款的，承揽人对完成的工作成果享有留置权或者有权拒绝交付，但是当事人另有约定的除外。
Article 783
Where a client fails to pay the remuneration, material fees, or the like, the
contractor has the right to retain the work product under lien or to refuse
delivery, unless otherwise agreed by the parties.
第七百八十四条 承揽人应当妥善保管定作人提供的材料以及完成的工作成果，因保管不善造成毁损、灭失的，应当承担赔偿责任。
Article 784
A contractor shall properly keep the materials provided by the client and the
completed work product, and shall bear the liability for compensation if such
materials or the work product is destructed, damaged, or lost owing to his
inappropriate maintenance thereof.
第七百八十五条 承揽人应当按照定作人的要求保守秘密，未经定作人许可，不得留存复制品或者技术资料。
Article 785
A contractor shall keep confidential the relevant information in accordance with
the requirements of the client and, without the latter’s permission, may not
retain copies or technical data thereof.
第七百八十六条 共同承揽人对定作人承担连带责任，但是当事人另有约定的除外。
Article 786
Co-contractors shall bear joint and several liabilities to the client, unless
otherwise agreed by the parties.
第七百八十七条 定作人在承揽人完成工作前可以随时解除合同，造成承揽人损失的，应当赔偿损失。
Article 787
The client may rescind the work contract at any time before the contractor
completes his work and shall bear the liability for compensating any loss thus
caused to the contractor.
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