Passage: In ancient times, most Koreans believed in their indigenous religion socially guided by mu (shamans). Buddhism was introduced from the Chinese Former Qin state in 372 to the northern Korean state of Goguryeo, and developed into distinctive Korean forms. At that time, the Korean peninsula was divided into three kingdoms: the aforementioned Goguryeo in the north, Baekje in the southwest, and Silla in the southeast. Buddhism reached Silla only in the 5th century, but it was made the state religion only in that kingdom in the year 552. In Goguryeo the Korean indigenous religion remained dominant, while Buddhism became more widespread in Silla and Baekje (both areas comprehended in modern South Korea).

Question: What state did the Chinese Former Qin introduce Buddhism to?
Goguryeo