How did Grandma Tu Tu die?

Grandma Big Ear Niu died of illness. According to relevant information, in the cartoon Tu Tu with Big Ears, Grandpa Niu's companion Grandma Niu died of illness, leaving Grandpa Niu alive. After Grandma Niu died, with the help of the Tu Tu family, Grandpa Niu lived happily every day. Tu Tu with Big Ears is a TV cartoon directed by Suda, written by Dingdang and produced by Shanghai Animation Film Studio. The play tells the growth story of Hu Tutu and his friends. The work premiered on the Children's Channel of CCTV on June 1 2004, with 130 episodes, each episode 12 minutes.