We need to write a 1500+字 article (1500 Chinese characters), with 6-8 paragraphs, each 150-250 characters. Title is given, but we must not output title, only the body. Must be natural, conversational, no AI words. Must avoid the prohibited words. Must be at least 1050 chars, but target 1500+.
We need 6-8 paragraphs, each 150-250 characters. Let's aim for 7 paragraphs, each around 210 characters. That gives about 1470 characters, need 1500+. Maybe make each 220 characters => 1540. We'll produce 7 paragraphs of ~220 chars.
We need to avoid prohibited words: 禁止使用的AI套路词 includes many; we need to not use them. Also avoid "、" etc. Use direct start. No headings. Use natural flow.
Paragraph length counting characters includes Chinese characters. We'll approximate.
We'll produce paragraphs separated by blank lines.
Let's craft content about database installation and migration case. Include specifics: MySQL 8.0 from on-prem to cloud, steps: environment prep, backup, test migration, data sync, cutover, validation, monitoring. Use real details.
We must ensure no prohibited words: "、总的来说、可否" etc. Avoid them.
We can use "比如" "可以" "同时" "不过". Avoid "". Use direct sentences.
We need 150-250 characters per paragraph. Let's approximate length.
Paragraph 1: around 220 characters. Let's write about opening, connecting to title.
Paragraph 1 draft: "在实际项目里，数据库的搬迁往往决定了系统能否顺利上线。今天就用一次真实的迁移实战来说明，怎么在不影响业务的前提下完成从本地MySQL 5.7到云端MongoDB的平滑切换。" Count characters: let's count roughly. Each Chinese character counts as one. Let's count: "在实际项目里，数据库的搬迁往往决定了系统能否顺利上线。今天就用一次真实的迁移实战来说明，怎么在不影响业务的前提下完成从本地MySQL 5.7到云端MongoDB的平滑切换。" Let's count:
在(1) 实(2) 际(3) 项(4) 目(5) 里(6) ，(punct) maybe not count? but we count characters including punctuation? Usually count characters includes punctuation? Probably count all characters including punctuation. But we need approximate length. Anyway we need 150-250 characters per paragraph. This paragraph maybe around 70 characters, too short. Need 150-250. So we need longer.
We need each paragraph 150-250 characters. Let's craft longer paragraphs.
Paragraph 1: around 200 characters. Let's write something like:
"在真实的项目中，数据库的搬迁往往是决定上线节奏的关键环节。我们这次案例聚焦于把一套本地部署的MySQL 5.7迁移到云端的MongoDB实例，整个过程从需求梳理到最终上线，只用了三天时间，却避免了业务中断。下面，我把每一步的细节拆开来说，帮助你把同样的流程复制到自己的项目里。"
Now count characters: Let's count roughly. I'll count manually:
在(1) 真(2) 实(3) 的(4) 项(5) 目(6) 中，(punct) 数(7) 据(8) 库(9) 的(10) 搬(11) 迁(12) 往(13) 往(14) 决(15) 定(16) 上(17) 线(18) 节(19) 关(20) 键(21) 环(22) 节(23) 。(punct) 我(24) 们(25) 本(26) 次(27) 案(28) 例(29) 聚(30) 焦(31) 于(32) 把(33) 一(34) 套(35) 本(36) 地(37) 部(38) 署(39) 的(40) MySQL(???) Actually English letters count as characters? Probably counts as characters too. But we can approximate length. This seems maybe around 150 characters? Let's count more precisely ignoring punctuation but counting letters.
Better to write paragraphs of known length. But we can approximate that each paragraph will be around 200 characters. Since we need 150-250, it's okay.
We need 7 paragraphs.
Paragraph 2: describing preparation steps.
Paragraph 3: backup and test.
Paragraph 4: migration execution.
Paragraph 5: cutover and validation.
Paragraph 6: monitoring and performance.
Paragraph 7: summary and takeaways.
Make sure no prohibited words. Avoid "" "". Use direct sentences.
We must not use "标题已确定为..." etc. Just write body.
Let's craft paragraphs ~220 characters each.
We'll produce 7 paragraphs.
Now write them, ensuring each paragraph separated by a blank line.
Paragraph length check: We'll approximate.
Paragraph 1 (approx 210 chars): Already wrote above maybe ~180. Let's expand.
"在真实的项目里，数据库的搬迁往往决定了上线节奏的快慢。我们这次把本地的MySQL 5.7实例平滑迁移到云端的MongoDB，整个过程只用了三天，却保证了业务零停机。下面把每一步的关键细节展开，帮助你把同样的方案复制到自己的系统里。"
Now count characters: Let's count roughly:
在(1) 真(2) 实(3) 的(4) 项(5) 目(6) 里（punct） 数据库的搬迁往往决定了上线节奏的快慢。 (maybe 20) 我们这次把本地的MySQL 5.7实例平滑迁移到云端的MongoDB，整个过程只用了三天，却保证了业务零停机。 (maybe 30) 下面把每一步的关键细节展开，帮助你把同样的方案复制到自己的系统里。 (maybe 30) Actually need 200 characters. Let's count more precisely.
I'll count characters including spaces? Probably not needed. Let's just trust it's within range. Might be slightly low. Let's add more details.
Add: "我们这次把本地的MySQL 5.7实例平滑迁移到云端的MongoDB，整个过程只用了三天，却保证了业务零停机。" That's about 30-35 characters. Let's count:
我(1) 们(2) 本(3) 次(4) 把(5) 本(6) 地(7) 的(8) MySQL(9) 5.7(10) 实(11) 例(12) 平(13) 滑(14) 迁(15) 改(16) 到(17) 云(18) 端(19) 的(20) MongoDB(21) ，(punct) 整(22) 个(23) 过(24) 程(25) 只(26) 用(27) 了(28) 三(29) 天(30) ，(punct) 却(31) 保(32) 证(33) 了(34) 业(35) 务(36) 零(37) 停(38) 机(39) 。(punct) That's 39 characters (approx). Plus preceding text maybe 30. So total maybe 70. Need more. Let's add more description earlier.
Let's rewrite paragraph 1 longer:
"在真实的项目里，数据库的搬迁往往决定了上线节奏的快慢。我们这次把本地的MySQL 5.7实例平滑迁移到云端的MongoDB，整个过程只用了三天，却保证了业务零停机。为了实现这一目标，团队先后完成了环境预检查、数据备份、以及测试迁移三个关键环节。下面把每一步的细节展开，帮助你把同样的方案复制到自己的系统里。" Let's count approximate characters: This seems longer, maybe 180-200. Should be okay.
We'll trust it's within 150-250.
Paragraph 2: talk about environment prep and version selection.
"迁移前的环境准备工作是决定后续顺利的基础。我们先在云端新建了一个与本地相同配置的MongoDB集群，并确认了版本兼容性。因为MySQL 5.7的查询语法与MongoDB的文档结构差异较大，必须先在测试库里跑通所有关键SQL。通过脚本自动生成同等结构的JSON文档，确保迁移后的数据格式与业务要求完全一致。" Approx length maybe 200.
Paragraph 3: backup and test migration.
"在正式搬迁之前，完整的备份是必不可少的防护措施。我们采用了全库快照的方式，把MySQL的二进制日志同步保存到对象存储，随后在测试环境恢复并执行一次完整的迁移演练。演练过程中，利用工具把表结构和数据逐一转换，并通过校验脚本对对比前后记录的行数、唯一键完整性以及索引统计进行对比。只要任何一步出
