Below is the full HTML of the event invitation landing page, optimized for mobile. Copy and paste it as is to see it work. It's saved in your browser's local storage. For actual operation, refer to the API integration section in the comments and change it to server storage. ```html
미래를 여는 MCDI | 라오까이 시범설치 초청
Lao Cai Pilot Installation · 100-ton Water Purification System per Day
Vietnam Local Optimized Water Purification Technology Demo & Free O2&B System
Monday, November 3, 2025, 5:00 PM–8:00 PM
Seminar and dinner included
Invitation for the first 50 people
Until the event starts
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Day
--
hour
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minute
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candle
As of: 2025-11-03 17:00 (can be changed in the time zone setting code)
Application status
0 / 50 Name reception
50 seats left
Equipment and Technology Videos
Just enter the YouTube video ID in data-video-id and it will be loaded automatically.
Browse photos
Event Information
program
Seminar (technology introduction/Q&A) + equipment demonstration + dinner networking
hour
Monday, November 3, 2025, 5:00 PM–8:00 PM
core
Introducing a 100-ton-per-day water purification system, optimized water quality in Vietnam, and a free O2&B system.
garden
First 50 people (real-time count on this page)
Invitees
- Central and local government agencies and public corporations
- Companies related to water supply, sewage, water treatment, and environmental industries
- Research institutes, universities, development cooperation organizations, etc.
Your submission has been received. Thank you!
``` Description Summary - Save registration: It is saved in the browser localStorage and the counter is updated in real time. When the quota reaches 50 people, the button is automatically disabled and marked as "Closed." - Timer: Countdown based on 2025-11-03 17:00. To change to Vietnam time, change +09:00 in EVENT_ISO to +07:00. - YouTube video: It will be loaded automatically if you just enter the actual video ID in the data-video-id attribute. - Photo slideshow: Supports autoplay and touch swipe. Operational tips - Currently, it is saved locally, so it is saved separately for each user browser. If you need actual statistics, connect the server API as in the saveRegistrationToServer example in the comments to manage the total number of registrants.