Update README.md

README.md

@@ -10,7 +10,7 @@ Python toolkit for submitting quantum circuits on the superconducting quantum co
 
 ## Introduction
 
-PyQuafu is developed for the users of [Quafu](http://quafu.baqis.ac.cn/) to construct, compile and execute quantum circuits on real quantum devices. One can use PyQuafu to interact with different quantum backends provides by the experimental group of [Quafu](http://quafu.baqis.ac.cn/).
+**PyQuafu** is developed for the users of [Quafu](http://quafu.baqis.ac.cn/) to construct, compile and execute quantum circuits on real quantum devices. One can use PyQuafu to interact with different quantum backends provides by the experimental group of [Quafu](http://quafu.baqis.ac.cn/).
 
 ## Installation