First of all, you have to pass the tour guide qualification exam. After passing the exam, the Tourism Bureau will issue you a green leather tour guide qualification certificate, but this is not a real tour guide certificate.
Secondly, you need to attend a training course organized by the local tourism bureau (the cost varies from place to place, and it seems to be 280 in Shandong this year);
Thirdly, after passing the training, find the travel agency or tour guide service center that needs to be affiliated, sign a contract with them, and then take this contract to the tourism bureau to renew the IC card, which is what people usually call the tour guide card.
I hope it helps you!