Derived from the principle of "hand muss hand wahren", bona fide gaining has been incorporated into civillaws of all the countries.
善意取得制度起源于“以手护手”原则，现已纳入各国民法中。
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In China, Because of the congenital limitation of the legislation of civil law, Joint and several debt appears in civillaws disorderly, and there is not a mature theoretical system.
As one of the important principles in civillaws, good faith doctrine should meet the need of various views towards litigation as well as more and more complex situation of litigation.