“to develop / to expand” in Japanese is 展, read ten, no (てん, の). It is a Grade 6 Kyōiku kanji, taught in year 6 of Japanese elementary school, and appears in words such as 発展 (development).
What does 展 mean?
絵の展覧会を見に行く。
Same sound, different character — the classic trap. Compare them side by side: