Original sentence: Although the term has no negative connotations in older dictionaries, and the usage of such parallel compound terms as Englishman, Frenchman and Irishman remain unobjectionable, the term Chinaman is noted as offensive by modern dictionaries
Edited sentence: Although this term had been used as a racial slur before the Chinese exclusion act 1882, the explanations in some dictionaries published later in 1902~1960, showed no negative connotations.While usage of some English terms referring to particular racial or ethical groups as Englishman, Frenchman and Irishman remain unobjectionable, the term Chinaman is noted as offensive by modern dictionaries