Complex sentence: The "Dai Kan-Wa Jiten", which is considered to be comprehensive in Japan, contains about 50,000 characters, but the "Zhonghua Zihai", published in 1994 in China, where Chinese characters are used more extensively, contains about 80 000 characters.
Split into simpler sentences: The "Dai Kan-Wa Jiten" contains about 50,000 characters, which is considered to be comprehensive in Japan. The Zhonghua Zihai, published in 1994 in China where Chinese characters are used more extensively, contain about 80 000 characters.