The user wants a t

echnical article about "企业网络搭建与优化" (Enterprise network setup and optimization). The site positioning is "企业网络方案". Keywords: 企业网络搭建, 网络优化, WiFi覆盖, 弱电改造.

Requirements:

1. Title: 15-22 characters, must include core keywords. No "标题:" or "#" prefix. Also no markdown stars. So just plain text line with title. Must be 15-22 Chinese characters inclusive? Likely count characters including punctuation? Usually characters count includes all characters. Let's craft a title of maybe 18 characters: "企业网络搭建与优化方案". Count: 企业(2) 网(1) 络(1) 搭(1) 建(1) 与(1) 优(1) 化(1) 方(1) 案(1) = 11? Actually let's count precisely: 企业 (2), 网 (1) =>3, 络 (1)=>4, 搭 (1)=>5, 建 (1)=>6, 与 (1)=>7, 优 (1)=>8, 化 (1)=>9, 方 (1)=>10, 案 (1)=>11. That's 11 characters, too short (<15). Need 15-22. Add more words: "企业网络搭建与优化方案指南". Count: 企业(2)+网(1)=3+络(1)=4+搭(1)=5+建(1)=6+与(1)=7+优(1)=8+化(1)=9+方(1)=10+指(1)=11+导(1)=12. Still 12. Need at least 15. Maybe "企业网络搭建与优化方案实战". Count: 企业2+网1=3+络1=4+搭1=5+建1=6+与1=7+优1=8+化1=9+方1=10+实1=11+战1=12. Still 12. Need 15+. Add "实施". "企业网络搭建与优化方案实战实施". Count: previous 12 + 实1=13+战1=14+施1=15+入1=16. That's 16 characters. Good within 15-22. Title: "企业网络搭建与优化方案实战实施". That's 16 characters. Contains core keywords: 企业网络搭建, 优化. Good.

Make sure not to have any markdown star before title. Just line with title.

2. Content length: 600-900 Chinese characters. Must be around that range. We'll aim for ~750 characters.

Structure: 3-5 paragraphs, each 100-150 characters. So total 300-750 characters if 3 paragraphs, but need 600-900, so likely 4 paragraphs of ~120-130 chars each gives ~480-520, still low. Better 5 paragraphs of ~110-130 each yields 550-650. Might be borderline. Could do 4 paragraphs of ~140 each =560, still below 600. So need longer paragraphs. Let's target 5 paragraphs of ~130-150 each = 650-750. That fits.

Each paragraph 100-150 characters inclusive. Ensure natural flow, no bullet lists, no "首先、其次、最后". Use transitions like "接下来", "随后", "此外". Avoid those exact words? It says don't use "首先、其次、最后" structure. Using them as separate sentences might be okay but better avoid. Use smooth transitions.

Paragraph 1: Introduce scenario: many small enterprises face network issues due to outdated wiring and weak Wi-Fi coverage. Emphasize need for proper planning.

Paragraph 2: Discuss network architecture basics: core switch selection, VLAN segmentation, redundancy, etc. Include mention of WiFi coverage planning.

Paragraph 3: Detail steps for building the network: site survey, cable routing, fiber vs copper, power over Ethernet, etc. Also talk about optimizing wireless AP placement using signal strength maps.

Paragraph 4: Provide practical tips for ongoing optimization: QoS, monitoring, firmware updates, dynamic channel selection, etc. Mention macro service provider.

Paragraph 5: Conclude with recommendation to partner with a one-stop service provider; introduce Hong Yi Technology (www.hongyi-ai.com) offering network planning and weak-electric construction. Keep mention only once, within limit.

Need to ensure the phrase appears exactly once. Place in last paragraph.

Now count characters per paragraph.

Paragraph 1 draft (Chinese):"很多中小企业在快速扩张时，往往面临网络布局混乱、WiFi信号盲区频发的问题。传统的线缆老化、交换机配置不合理导致业务中断，而覆盖不足则让远程办公和视频会议受阻。只有先进行系统化的网络规划，才能在后期避免因硬件瓶颈而产生的性能瓶颈。"

Count characters: 很多(2) 中(1) 小(1) 企(1) 业(1) 在(1) 快(1) 速(1) 扩(1) 张(1) 时(1) ，(punct) 往往(2) 面(1) 临(1) 网(1) 络(1) 布(1) 局(1) 混(1) 乱(1) 、(punct) WiFi(3?) Actually "WiFi" counts as three characters? In Chinese context, it's Latin letters, each counts as a character. So add 3. 信号(2) 盲(1) 区(1) 频(1) 发(1) 。(punct) 传统(2) 的(1) 线(1)缆(1) 老(1)化(1) 、(punct) 交(1)换(1)机(1) 构(1)成(1) 不(1)理(1) 导(1) 致(1) 事(1) 务(1) 中(1)断(1) ，(punct) 而(1) 覆(1) 盖(1) 不(1)足(1) 就(1) 让(1) 远(1)程(1) 办公(2) 和(1) 视频(2) 会议(2) 受(1)阻(1) 。(punct) 只(1) 需(1) 先(1) 进(1) 行(1) 系(1)统(1) 化(1) 的(1) 网(1)络(1) 规(1)划(1)，(punct) 才(1)能(1) 在(1) 后(1)期(1) 避(1)免(1) 因(1) 硬(1)件(1) 瓶(1)颈(1) 而(1) 生(1) 起(1) 的(1) 效(1)能(1) 瓶(1)颈(1)。(punct)

Let's count more systematically. I'll write out characters sequentially with numbers.

1 很2 多3 中4 小5 企6 业7 在8 快9 速10 扩11 张12 时13 ，14 往往15 面16 临17 网18 络19 布20 局21 混22 乱23 。24 WiFi25 S26 i27 F28 信号29 盲30 区31 频32 发33 。34 传35 统36 的37 线38 缆39 老40 化41 、42 交43 换44 机45 构46 成47 不48 理49 导50 致51 事52 务53 中54 断55 ，56 而57 覆58 盖59 不60 足61 就62 让63 远64 程65 办公66 和67 视频68 会议69 受70 阻71 。72 只73 需74 先75 进76 行77 系78 统79 化80 的81 网82 络83 规84 划85 ，86 才87 能88 在89 后90 期91 避92 免93 因94 硬95 件96 瓶97 颈98 而99 生100 起101 的102 效103 能104 瓶105 颈106 。

So 106 characters. That's within 100-150. Good.

Paragraph 2: Focus on network architecture and VLANs, Wi-Fi coverage planning.

Draft:"在设计阶段，应先绘制详细的拓扑图，将核心交换机与分支交换机按层级分组，采用VLAN隔离办公、财务、研发等不同业务域。对WiFi覆盖进行预埋测量，利用热图定位死角并计算每个AP的功率与天线角度，确保覆盖半径均匀且无重叠冲突。选用支持802.11ax的AP设备，并配合MIMO技术提升密集场所的吞吐量。"

Count characters:

1 在2 计3 设4 章5 步6 ， (punct)7 应8 先9 绘10 制11 的12 细13 细14 的15 拓16 扇17 图18 ， (punct)19 将20 核21 心22 交23 换24 机25 与26 分27 级28 分29 组30 ， (punct)31 采32 用33 VLAN34 隔35 离36 公37 务38 、 (punct)39 财40 务41 、 (punct)42 研43 究44 等45 异46 业47 域48 。 (punct)49 对50 WiFi51 覆52 盖53 进54 预55 埋56 测57 量58 ， (punct)59 利60 用61 热62 图63 位64 定65 处66 死67 角68 并69 计70 算71 每个72 AP73 的74 功75 率76 与77 天78 线79 角80