Installation problems with echarts version

when installing the two versions of v4.2.0.rc1 npm install echarts@4.2.0.rc2 v4.2.0.rc2 in the vue project, I was prompted that I could not find a matching version to install the
rc1-- save method. I don"t know why. Please answer!

Apr.14,2022

version number is wrong. Install npm install echarts@4.2.0-rc.2-- save

like this
Menu