In chapter 7 lien on sub-freight and lien on sub-earning are analyzed, and the conclusion is that both liens are assignment of creditor 's right and not possessory liens.
第7章讨论分租运费留置权和转租收入留置权，结论为二者的性质是债权转让而非占有留置权。
2
Article 231 the movables retained by the creditor fall in the same nexus of legal relationships with the creditor's claims, except in the case of a lien between enterprises.