There is still more than a month to go to Phuket with the tour group, and now I don't want to go after paying the tour fee. Will the tour group refund the money?

If there is more than one month before the departure date, you should be able to get a full refund. I don't know if you signed an outbound travel contract for China citizens when you signed up. Article 14 of the China Citizens' Outbound Travel Contract stipulates that tourists and tour groups may propose to terminate the contract in writing before departure. If the termination of the contract is proposed more than 30 days before departure (calculated by the natural difference between the departure date and the arrival date of the notice of termination of the contract), both parties shall not be liable for breach of contract. The package travel agency shall refund all the travel expenses to the tourists within 5 working days from the date of the notice of termination of the contract. The visa/endorsement fee shall not be deducted if the package travel agency proposes to terminate the contract; The visa/endorsement fee shall be deducted if the tourist proposes to terminate the contract and has already applied for the visa/endorsement.

It usually takes three to five days to get a visa to Thailand in Phuket, so it is unlikely that the travel agency will get a visa more than one month in advance. You should be able to get a full refund. You can see it when you get a visa, so you have to deduct the visa fee.