https://www.cnn.com/2018/03/01/asia/china-letter-ban-trnd/index.html Looks like El-Presidente JiPig might be losing his grasp on sanity.
They also briefly banned Winny the Pooh because people said Xi walking next to Obama looked like Winny the Pooh walking next to Christopher Robin. Xi supposedly was in a rage when people kept calling him Winnie the Pooh behind his back comparing Pooh's love of honey to Xi's love for bribes and money.
The letter N thing was short-lived enough that it was probably an accident. (Yes, people are that inept around here.) The Winnie the Pooh censoring is nothing new.