We need to write an article without title, 1500+ words (>=1050). Structure: 6-8 paragraphs, each 150-250 words. Must be natural, conversational style, avoid AI language. Use specific examples, concrete statements. No title at output, just the article body. Must echo title at beginning and ending. Title is "数据库迁移实战指南，数据平滑过渡零丢失". So opening should refer to this title theme, maybe first paragraph starts with something like "在实际项目里，数据库迁移..." etc. Title already given, but we can't output it; we just need to echo it in opening and ending. Means first paragraph should reference the title concept, and final paragraph should echo it again.
Each paragraph 150-250 words. Let's aim for 7 paragraphs each ~200 words => total ~1400, need 1500+. So maybe 8 paragraphs each 200 words = 1600. Must be 6-8 paragraphs. Let's do 7 paragraphs of ~220 words each => total ~1540. Must ensure each paragraph length between 150-250 words. We'll count approximate words.
Paragraph 1: ~220 words, introduce topic, echo title concept.
Paragraph 2: talk about planning and assessment.
Paragraph 3: talk about environment prep and schema migration.
Paragraph 4: talk about data migration techniques, tools, incremental sync.
Paragraph 5: talk about testing and validation.
Paragraph 6: talk about cutover and go-live.
Paragraph 7: conclude, echo title viewpoint.
Make sure no AI phrasing, avoid listed keywords.
We'll write in Chinese, conversational tone.
Now craft paragraphs with approx word count. Let's approximate.
Paragraph 1: need 220 words. Let's write about 220 Chinese characters? Words count is ambiguous; they likely count words separated by spaces? In Chinese, words not separated; they might count characters? Usually they count characters? But requirement "字数要求：必须写满1500字，不能少于1050字！" likely means characters (word count?). We'll assume characters. So need 1500 Chinese characters overall. Each paragraph 150-250 characters. So we need total ~1500 characters. That's doable. Let's aim each paragraph ~210 characters. 7 paragraphs => 1470, need a bit more. Let's do 8 paragraphs of ~190 characters => 1520. But requirement 6-8 paragraphs, we can do 8 paragraphs. Let's do 8 paragraphs each ~190-200 characters. That will be ~1520-1600 characters.
We'll produce 8 paragraphs of ~190-200 characters each. Let's count roughly.
I'll write paragraphs and approximate character count.
Paragraph1 (~200 characters): "搞一件数据库迁移，往往要面对数据不掉线、业务不中断的压力。今天聊的《数据库迁移实战指南，数据平滑过渡零丢失》不只是一句口号，而是一套从头到尾都要落地的实操思路。下面，我就带大家一步步拆解，怎么在真实项目里把数据平稳迁过去，而不出现任何丢失的情况。"
Count characters: Let's count roughly:
"搞一件数据库迁移，往往要面对数据不掉线、业务不中断的压力。" => 24? Actually let's count precisely later. But approximate 200.
Paragraph2: planning and assessment.
Paragraph3: environment prep.
Paragraph4: migration tools and incremental.
Paragraph5: testing and validation.
Paragraph6: cutover and go-live.
Paragraph7: monitoring and post-migration.
Paragraph8: concluding echo.
We need to ensure each paragraph 150-250 characters. Let's craft each about 190-210 characters.
I'll draft paragraphs, then count roughly.
Paragraph1 (approx 200 characters):
"搞一件数据库迁移，往往要面对数据不掉线、业务不中断的压力。今天聊的《数据库迁移实战指南，数据平滑过渡零丢失》不只是一句口号，而是一套从头到尾都要落地的实操思路。下面，我就带大家一步步拆解，怎么在真实项目里把数据平稳迁过去，而不出现任何丢失的情况。"
Let's count characters quickly:
搞(1)一(2)件3? Chinese counting each character. Let's approximate length: It looks about 120 characters? Might be less. Let's count manually:
搞一件数据库迁移，往往要面对数据不掉线、业务不中断的压力。 That's about 27 characters? Actually let's count:
搞(1)一(2)件(3)数(4)据(5)库(6)迁(7)移(8)，往(9)常(10)要(11)面(12)对(13)数(14)据(15)不(16)掉(17)线(18)、业(19)务(20)不(21)中(22)断(23)的(24)压(25)力(26)。 So 26 characters. That's too short. Need 150-250 characters per paragraph. So we need longer paragraphs.
Thus each paragraph must be 150-250 Chinese characters. Let's aim for ~180-200 characters each.
We'll need to write longer paragraphs.
Let's craft paragraph1 with about 180 characters.
"搞一件数据库迁移，往往要面对数据不掉线、业务不中断的压力。今天聊的《数据库迁移实战指南，数据平滑过渡零丢失》不只是一句口号，而是一套从头到尾都要落地的实操思路。下面，我就带大家一步步拆解，怎么在真实项目里把数据平稳迁过去，而不出现任何丢失的情况，先从整体规划说起。"
Now count characters: Let's count roughly.
搞(1)一(2)件(3)数(4)据(5)库(6)迁(7)移(8)，往(9)常(10)要(11)面(12)对(13)数(14)据(15)不(16)掉(17)线(18)、业(19)务(21?) Actually "业务" two characters. Let's just approximate length: It's likely around 120 characters. Need more. We'll add more sentences.
Add: "先要明确业务范围、确定迁移目标、列出关键表和依赖，再估算数据量和迁移窗口，这样后面的每一步才不至于手忙脚乱。" That adds more.
Let's rewrite paragraph1 fully with length ~180-200 characters.
"搞一件数据库迁移，往往要面对数据不掉线、业务不中断的压力。今天聊的《数据库迁移实战指南，数据平滑过渡零丢失》不只是一句口号，而是一套从头到尾都要落地的实操思路。下面，我就带大家一步步拆解，怎么在真实项目里把数据平稳迁过去，而不出现任何丢失的情况，先从整体规划说起。先要明确业务范围、确定迁移目标、列出关键表和依赖，再估算数据量和迁移窗口，这样后面的每一步才不至于手忙脚乱。"
Now count characters roughly: Let's count quickly. I'll count characters including punctuation? Probably count all characters. Let's approximate:
搞一件数据库迁移，往往要面对数据不掉线、业务不中断的压力。 (26)
今天聊的《数据库迁移实战指南，数据平滑过渡零丢失》不只是一句口号，而是一套从头到尾都要落地的实操思路。 (maybe 38)
下面，我就带大家一步步拆解，怎么在真实项目里把数据平稳迁过去，而不出现任何丢失的情况，先从整体规划说起。 (maybe 40)
先要明确业务范围、确定迁移目标、列出关键表和依赖，再估算数据量和迁移窗口，这样后面的每一步才不至于手忙脚乱。 (maybe 45)
Total maybe 150-170. Need 150-250, okay maybe near 170, acceptable. It's within range.
Now paragraph2: about assessment and mapping.
"接下来是详细的评估和映射工作。先把源数据库的结构、字符集、索引、约束全盘拆解出来，生成对应的DDL脚本。然后在目标库里预先建好同等结构的表，最好把字段长度、约束条件全部对齐，避免后期改表导致的额外开销。此阶段的细致程度直接决定后面迁移是否顺畅，关键的一点是把业务方的全部字段依赖记录下来，尤其是那些隐藏的外键和唯一索引，不能错过。"
Count characters likely ~200. Good.
Paragraph3: environment prep and schema migration.
"环境准备方面，先在测试库里跑一遍完整的DDL，确认没有语法错误或是数据类型不兼容。很多时候，MySQL和PostgreSQL的字符集默认不同，需要手动指定utf8mb4，否则在迁移时会出现乱码。可以使用
