Matter Object物质对象
Firstly, the object matter is movable property without any restrictions; in the case of the formalism of legislation, there is no necessity for the real estate both theoretically and practically.
第一，保留所有权买卖的客体为动产，而且对其无范围限制；在物权变动采形式主义的立法下，不动产于理论和实践上均无成为保留所有权买卖客体的必要。
参考来源 - 保留所有权买卖制度研究