Why can't Yongkang Tong be used?

It was taken off the shelf because of copyright issues. Yongkangtong is an APP that shows all regions. Because it is convenient and free, and the memory is still small, it is widely liked by people. However, once Yongkangtong official website released a news that it was taken off the shelf because of copyright issues. Now Yongkangtong has changed to a software called Weather that comes with every mobile phone.