Is it a scam for two people to travel to Guizhou and one person to avoid it?

Two people are traveling in Guizhou, and one person is free. There may be fraud and it needs careful identification. Some travel companies will attract consumers through this marketing method, but in fact there may be hidden terms and restrictions, such as the number of tourists and paying a certain fee in advance. Before taking part in the activity, you must read the activity details carefully to avoid being cheated.