第三十九条 增值税法第二十八条第一款第一项所称收讫销售款项，是指纳税人发生应税交易过程中或者完成后收到款项；取得销售款项索取凭据的当日，是指书面合同确定的付款日期，未签订书面合同或者书面合同未确定付款日期的，是指应税交易完成的当日，即货物发出、服务完成、金融商品所有权转移、无形资产转让完成或者不动产转让完成的当日。
This approach requires sourcing and maintaining accurate information, which means you can't fabricate numbers or exaggerate metrics. AI models increasingly cross-reference claims across sources, and inconsistencies damage credibility. The data you include must be truthful and, where relevant, attributed to primary sources. But when you consistently provide specific, accurate information, you build a reputation as a reliable source that AI models return to repeatedly.
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