Toy model of Tintin based on the comic series "The Adventures of Tintin" is seen at a gift shop in Brussels, Belgium, Jan. 10, 2019. Belgian comic works "The Adventures of Tintin" celebrated its 90th anniversary on Thursday. The series of 24 comic albums were created by Belgian cartoonist Georges Remi, who wrote under the pen name Herge. (Photos: Xinhua)

A wall painted with cartoon figures in the comic series "The Adventures of Tintin" is seen in Brussels, Belgium, Jan. 10, 2019.

A customer views products on comic series "The Adventures of Tintin" at a shop in Brussels, Belgium, Jan. 10, 2019.

Toy model of Tintin based on the comic series "The Adventures of Tintin" is seen at a gift shop in Brussels, Belgium, Jan. 10, 2019.

Comic series "The Adventures of Tintin" are seen at a shop in Brussels, Belgium, Jan. 10, 2019.

Toy models of Tintin and other figures based on the comic series "The Adventures of Tintin" are seen at a gift shop in Brussels, Belgium, Jan. 10, 2019.

A man walks by a poster celebrating the 90th anniversary of "The Adventures of Tintin" in Brussels, Belgium, Jan. 10, 2019.

Toy models of Tintin and other figures based on the comic series "The Adventures of Tintin" are seen at a gift shop in Brussels, Belgium, Jan. 10, 2019.

Toy models of Tintin and other figures based on the comic series "The Adventures of Tintin" are seen at a gift shop in Brussels, Belgium, Jan. 10, 2019.

Comic experts attend a press conference on the 90th anniversary of "The Adventures of Tintin" in Brussels, Belgium, Jan. 10, 2019.