Can I apply for a DTV in another country without using my tourist visa issued in Guangzhou?

Good afternoon everyone,

I received a tourist visa from Guangzhou. But I am not in guangzhou anymore (long story), and I would actually like to apply for a DTV instead, even though I received today my tourist visa.

Do I need to enter thailand with this tourist visa, wait for it to expire before applying for the DTV ? Can I directly apply for the DTV instead in another country, without entering Thailand with the tourist visa that was just issued for me ?

If I do need to use this tourist visa, can I enter from a different place than the one I applied from ?

Thanks for the help I am lost in space here 😅