参考答案：In accordance with Articles BCA of the Property Law, the following conditions shall be satisfied simultaneously where an obligee intends to claim the right of lien:(i) The obligee shall lawfully possess the movable of the obligor, such as the goods for transportation by a carrier or the equipment for repairing by a repairing plant. The immovable cannot be the subject matter of right of lien, even though it may be lawfully possessed by a party.(ii) The movable taken as lien by the obligee and obligee’s right shall fall into a same legal relationship, except for the lien between enterprises.(iii) The obligor does not settle his debts due.