You can use virtual keyboards as lookup utilities to simplify the input of certain special symbols.
The Simplified Chinese system supports several virtual keyboards.
The following figure shows the PC virtual keyboard.
The following figure shows the Greek virtual keyboard.
The following figure shows the Russian virtual keyboard.
The following figure shows the ZhuYin virtual keyboard.
The following figure shows the Chinese Punctuation Characters virtual keyboard.
The following figure shows the Number Symbol Lookup virtual keyboard.
The following figure shows the Mathematic Symbol Lookup virtual keyboard.
The following figure shows the Special Symbol Lookup virtual keyboard.
The following figure shows the Table Symbol Lookup virtual keyboard.