Huawei has revealed its own mobile operating system (Hongmeng).

https://www.huaweicentral.com/hongmeng-is-huaweis-first-ever-self-developed-operating-system/

Many analysts didn't believe that Huawei had its own mobile system.  Huawei had just released the name of its operating system (Hongmeng) and started to develop it since 2012.  The US has underestimated the Chinese.  The Chinese have a saying - Always prepare for a rainy day!

Google will regret its move to restrict Huawei to use google because Hongmeng is developed by using Linux and not Java (Android).  This will prompt many developers to develop applications using Linux because it is a truly decentralized programming language.  Besides, Linux is widely used in the networking servers sector.

http://sg-stock.blogspot.com/2019/05/it-will-be-hard-for-google-to-access.html