WBCI = Web Based [Check In | Customer Interaction], depending on how long person has been in the industry.
Evidence: hard to find online, but here's an out of date example that Tiger uses it for web checkin:
Second evidence: https://www.acronymfinder.com/WBCI.html
Answer compiled from the comments on the question.
In China there are different rules in different parts of the country, so you will need local knowledge to get the answer.
Best ask your host, if they have had earlier visitors who needed to register they will know which station to use. In need, visit the nearest police station and expect to be send on to an ...