Er, by the way, it&;s unclear whether you fly from Guangzhou to Thailand or from Guangzhou to Sanya, but this is not important. The answer to your question is as follows:
You can call 020-36066859 to ask if there is any storage service after * *.
* * * Trains are generally not late, but who can say for sure during Spring Festival travel rush! One is the flow of people, and the other is the weather (snowstorm in Hunan during Spring Festival travel rush last two years). At that time, you can check the progress of the train in real time in official website on the train.