The time to go to Thailand has changed. Is the landing card I applied for invalid?

What you want to ask is that if the time to go to Thailand has been changed, will the visa on arrival you applied for be invalid? no. According to the query on Zhihu, if the flight time is changed, the landing visa will still be valid within 15 days if there are no flight restrictions within 15 days. A visa on arrival means that the applicant does not obtain a visa to travel to other countries directly from the country where he or she is located. Instead, he or she arrives at the port of that country with a passport and an entry permit certificate issued by the relevant authorities of the country, and then a visa is issued. This is usually a unilateral exit. visa.