Of course it is not cost effective. General taxpayers although open 17%, but input tax is deductible, the actual tax burden is generally less than 3%.
I think if you are selling to hospitals and other units, it doesn't matter what kind of ticket you issue because the other party can't deduct it. If you are selling to the general taxpayer, for the other side, or VAT invoices accounting, even if it is open 3%, can be deducted than not deducted cost-effective