Maritime legal system from the perspective of civil law Juridical acts of identity from the perspective of civil code World heritage from the perspective of public law Research on ship mortgage from the perspective of civil code 并列题名:World heritage from the perspective of public law 并列题名:Juridical acts of identity from the perspective of civil code 并列题名:Polygraphic studies from the perspective of evidence law Research on the legality principle from the perspective of rule of law Research on water right allocation from the perspective of private law Gefalligkeit in perspective of civil law