xda科学上网

It seems like you might be referring to "DAA" or "科学上网," but the term "daa" is not clear to me. Could you please clarify what you mean by "daa"? If you're referring to "科学上网," that would likely mean "scientific internet" or "scientific access to internet services." If you meant something else, please provide more details, and I'll be happy to help!