The acquisition in good faith of lien has its composing element.

留置权的善意取得有其独立的构成要件.

The second part: the legislative thereunder of the system of Acquisition in good faith.

第二部分，善意取得制度的立法依据。

Part 3 expounds the relative establishment of acquisition in good faith and the gist of establishing the system.

第三部分论述了善意取得制度在我国的发展、我国善意取得制度的不足及我国建立善意取得制度的依据。

Acquisition in good faith is one of the institutions of civil law with long-term academic appeal, and its presence should serve the maximum protection for transaction security needs.

善意取得制度是民法上一个具有长久学术魅力的制度，其存在应当服务于最大限度地保护交易安全的需要。