Is the group tour on Ctrip reliable? Will you be cheated? Travel to Xiamen

Ctrip self-operated said that when the hotel is full, it will be changed to a hotel of the same level, but when the hotel can be booked online, the hotel can be changed privately. The weirdest thing is his after-sales service. He didn't even check whether the hotel had rooms, but just said, "We have upgraded the hotel standard for you." When we said there were still rooms in the hotel, she asked to find out more. They use the same rhetoric as ordinary small travel agencies. They have no responsibility of their own and have not joined the group yet. Just the hotel will make you very unhappy. There is a name of self-operation but no responsibility of self-operation.