According to the reports Bing search engine is now banned in china as it was allowed earlier because of its safe search.
But last week according to Microsoft officials china banned bing. Google was banned earlier beacuse of its open searching algorithm. Everyone is allowed to search some of the most sensitive topics in china thats why china banned google.
The banning of bing came in to place as a reaction to the arrest of Huawei ceo in USA. Google had a plan to launch a safe search version of google in china but opposed by the workers and politicians in USA it was not approved.
In china people are prohibited to search topics tiananmen square and many other topics. So china have banned many websites like facebook and many others because of the freedom to search anything.