Why we can't write "Bush hid the facts" in NOTEPAD

Question

I have written "Bush hid the facts" in notepad and saved the file after reopening it. It turn into some block chars 畢桳栠摩琠敨映捡獴

after that i have pasted it into MsExcel2007 i found that some chinese chars

Then i checked there ASCII code all chars were different but have same code i.e. 63 which is of ?

then i changed font to "WST_Engl" it looks like "bs i h at"

How this is happened ?

How i get Chinese chars as i don't found it in my windows?