Non-existent means something does not exist or is not present in reality.
存在 (cúnzài): Exist - This term refers to the state of being real or present.
虚构 (xūgòu): Fictional - It describes something that is made up or imaginary rather than existing in reality.
消失 (xiāoshī): Disappear - This term means to cease to be visible or exist, often suddenly or unexpectedly.