=========================
Case 1: create string from pack, with use bytes

char semantics: ÆIJ Length = 4, Content = 198.144.196.178
byte semantics: ÆIJ Length = 4, Content = 198.144.196.178
400.306
=========================
Case 2: create string from pack, with use utf8

char semantics: ÆIJ Length = 4, Content = 198.144.196.178
byte semantics: ÆIJ Length = 4, Content = 198.144.196.178
400.306
=========================
Case 3: create string from \x{}

char semantics: ÆIJ Length = 2, Content = 400.306
byte semantics: ÆIJ Length = 4, Content = 198.144.196.178
400.306