第四十四条 按次纳税的纳税人，销售额达到起征点的，应当自纳税义务发生之日起至次年6月30日前申报纳税。
if (stack.length === 0 && cur === 0) {
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马亚茨基1999年进入圣彼得堡国立大学东方系学习中文，后到北京语言大学留学。在中国期间，他第一次体验过春节，“灯笼红、饺子香、鞭炮响……春节所展现的红火兴旺以及中国民众吉祥喜庆的过年方式，给我留下了难忘的美好回忆。”马亚茨基说。
This creates both an opportunity and a maintenance requirement. The opportunity is that regularly updating content can improve AI citation rates even if the core information hasn't changed dramatically. The requirement is that high-performing content needs periodic refreshes to maintain its competitive position as newer articles on the same topics emerge.