We need to generate article in markdown with 3-6 chapters, each 2-4 paragraphs. Add 3-4 image placeholders with specified format: only HTML comment:

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. Not Markdown image syntax. Need image placements: after first or second paragraph of opening segment, then middle, then near end. Let’s design 4 chapters. Each chapter 2-3 paragraphs.nnWord count 300-800 Chinese characters? We’ll aim ~450-600 Chinese characters. Each paragraph about ~80-120 characters. Let’s craft.nnWe’ll insert placeholders after second paragraph of first chapter (i.e., after 2nd paragraph). But rule:

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