If I lost in China for 3 days, this Telegram bot will automatically send my personal information to my best friends for seeking rescues.

lost_alert.py

from telegram import Bot
from threading import Timer
from eventlet import Timeout

def main(bot):
    while True:
        update = bot.getUpdates()[-1]
        if update.message.text == '/start':
            timer = Timer(60*60*24*3, post_alert, args=[bot,update])
            timer.start()
            chat_id = update.message.chat_id
            bot.sendMessage(chat_id=chat_id,text='開始計時')
        elif update.message.text == '/cancel':
            timer.cancel()

def post_alert(bot,update):
    chat_id = update.message.chat_id
    text = '@user_name已超過3日失去聯繫，若有意幫助，請在1小時之內，發送"/info"獲取私人信息'
    bot.sendMessage(chat_id=chat_id,text=text)
    with Timeout(60*60,False):
        get_info(bot,update)

def get_info(bot,update):
    if update.message == '/info':
        user = update.message.effective_user
        text = 'tel:111, twitter:@user_name, 常住地：aaa，請把我的信息告訴推特@bbcchinese@nytchinese, 請求以政治迫害案件調查'
        bot.sendMessage(user.id,text=text)

if __name__ == '__main__':
    bot = Bot(token='Token')
    update = bot.getUpdates()[-1]
    try:
        main(bot)
    except:
        print('token failed.')