diff --git a/bot.py b/bot.py
new file mode 100644
index 0000000..9e058e0
--- /dev/null
+++ b/bot.py
@@ -0,0 +1,172 @@
+import re
+import tomllib
+import urllib.parse
+from pathlib import Path
+
+import requests
+from fastapi import FastAPI
+from hypy_utils import ensure_dir
+from hypy_utils.logging_utils import setup_logger
+from starlette.responses import HTMLResponse
+from starlette.staticfiles import StaticFiles
+from telegram import Update
+from telegram.ext import Application, CommandHandler, ContextTypes
+
+import db
+import utils
+from utils import gen_sha, CONFIG
+
+
+BOT_TOKEN = CONFIG["token"]
+BOT_NAME = CONFIG["name"]
+
+app = FastAPI()
+logger = setup_logger()
+bot = Application.builder().token(BOT_TOKEN).build()
+
+data_dir = Path(__file__).parent / "data"
+channels_dir = ensure_dir(data_dir / "channels")
+
+validating = set()
+
+
+def user_info(update: Update):
+    return (f"{update.message.from_user.id} {update.message.from_user.username or ''} "
+            f"{update.message.from_user.first_name or ''} {update.message.from_user.last_name or ''}")
+
+
+async def start(update: Update, context: ContextTypes.DEFAULT_TYPE):
+    logger.info(f"/start from {user_info(update)}")
+    await update.message.reply_text("🌳🌳🌳")
+
+
+def channel_html(channel: str):
+    if (channels_dir / f"{channel}.html").exists():
+        return (channels_dir / f"{channel}.html").read_text()
+    return requests.get(f"https://t.me/{channel}").text
+
+
+async def plant(update: Update, context: ContextTypes.DEFAULT_TYPE):
+    if update.message.chat.type != "private":
+        return
+
+    logger.info(f"/leaf from {user_info(update)}: {update.message.text}")
+
+    args, uid = context.args, update.message.from_user.id
+    if len(args) != 2:
+        logger.info(f"> Invalid args.")
+        return await update.message.reply_text("用法是 /leaf <上级频道名> <你的频道名> 哦~")
+
+    parent, channel = args
+    parent, channel = parent.strip("<>{} @"), channel.strip("<>{} @")
+    sha = gen_sha(channel, uid, parent)
+
+    # Check if channel only contains 0-9, a-z, A-Z and _
+    if not re.match(r"^[0-9a-zA-Z_]+$", channel):
+        logger.info(f"> Invalid channel name.")
+        return await update.message.reply_text("没有找到这个频道... 只有公开的频道可以参与，以及需要输入频道的 @用户名，不是显示名哦~")
+
+    if not db.channel_info(parent):
+        logger.info(f"> Parent channel not found.")
+        return await update.message.reply_text("上级频道还不在树上... 是不是打错了 qwq")
+
+    # 检查在不在树上
+    if db.channel_info(channel):
+        logger.info(f"> Channel already exists.")
+        return await update.message.reply_text(f"这个频道已经在树上了哦~ https://tree.aza.moe/c/{channel}")
+
+    # 检查验证码
+    text = channel_html(channel)
+    if 'noindex, nofollow' in text:
+        logger.info(f"> Channel noindex, nofollow.")
+        return await update.message.reply_text("没有找到这个频道... 只有公开的频道可以参与，以及需要输入频道的 @用户名，不是显示名哦~")
+
+    info = utils.extract_meta_tags(text)
+    if sha in text:
+        logger.info(f"> 🌿 Registering channel {channel} with parent {parent}.")
+        height = db.register(channel, info.title, parent)
+        await update.message.reply_text(f"""频道 {channel} 上树成功！把下面这条转发到频道里吧~""".strip())
+        url_enc = urllib.parse.quote_plus(f"https://tree.aza.moe/c/{channel}")
+        return await update.message.reply_html(f"""
+今天是植树节，想试试和大家一起种一颗 tgcn 频道树 🌳 qwq
+
+这里是 {info.title}，是 @{parent} 的树枝 🌿 在频道树的第 {height + 1} 层哦~
+
+（如果你也有公开频道，想成为这个频道的树叶的话，就去给 @tgtreebot 发送 <code>/leaf {channel} {{你的频道名}}</code> 吧！ &gt; &lt;） <a href="https://t.me/iv?url={url_enc}&rhash=d96b84e483dc30">\u200e</a>
+""".strip())
+
+    if sha not in validating:
+        logger.info(f"> Channel not validated, asking for validation.")
+        await update.message.reply_text(f"""
+好耶！
+
+不过上树之前，为了防止被滥用，需要先验证一下你是 {channel} 的管理员...
+
+请编辑频道简介加入验证码 {sha} 再重新执行这条指令吧~（加在哪里都可以的 > < 验证完就可以删掉）
+""".strip())
+        validating.add(sha)
+    else:
+        logger.info(f"> Channel not validated, asking again for validation.")
+        await update.message.reply_text("（看了一下好像频道信息还没有更新的样子... 确定加上了吗？再试试吧）")
+
+
+# Add handlers
+bot.add_handler(CommandHandler("start", start))
+bot.add_handler(CommandHandler("leaf", plant))
+
+
+@app.on_event("startup")
+async def startup_event():
+    """Starts the bot."""
+    logger.info("Starting bot...")
+    await bot.initialize()
+    await bot.start()
+    await bot.updater.start_polling()
+
+
+@app.on_event("shutdown")
+async def shutdown_event():
+    """Stops the bot on shutdown."""
+    logger.info("Stopping bot...")
+    await bot.updater.stop()
+    await bot.stop()
+    await bot.shutdown()
+
+
+layout_html = (Path(__file__).parent / "public" / "layout.html").read_text()
+fmt_html = lambda x: layout_html.replace("{{CONTENT}}", x).replace("\n", "")
+
+
+@app.get("/c/{channel}", response_class=HTMLResponse)
+def channel_info(channel: str):
+    info = db.channel_info(channel)
+
+    if not info:
+        return fmt_html(f"""
+            <h1>TGCN 频道树！</h1>
+            <p>频道 @{channel} 不在树上哦~</p>
+        """)
+
+    leaf_txt = '树枝' if info.children else '树叶'
+
+    return fmt_html(f"""
+        <h1>TGCN 频道树！</h1>
+        <p>这里是频道 <a href="https://t.me/{channel}">@{channel}</a> - {info.name}，{
+            f'在频道树的第 {info.height + 1} 层，是 <a href="https://t.me/{info.parent}">@{info.parent}</a> (<a href="/c/{info.parent}">🔗</a>) 的{leaf_txt}哦~'
+            if info.parent else "是树根哦~"
+        }</p>
+        {f"""<p>下面这些是这个频道的树枝：</p>
+        <ul>
+            {"".join(f'<li><a href="https://t.me/{child.username}">@{child.username}</a> (<a href="/c/{child.username}">🔗</a>) - {child.name}</li>' for child in info.children)}
+        </ul>""" if info.children else "这个频道是树叶哦~"}
+        <p class="note">（如果你也有公开频道，想成为这个频道的树叶的话，就去给 <a href="https://t.me/tgtreebot">@tgtreebot</a> 发送 <code>/leaf {channel} {{你的频道名}}</code> 吧! &gt; &lt;）</p>
+    """)
+
+
+app.mount("/", StaticFiles(directory="public", html=True))
+
+
+if __name__ == '__main__':
+    import uvicorn
+
+    uvicorn.run(app, host="0.0.0.0", port=9498)