Go to Nha Trang with the group, and the tour guide takes it to a small island. There are still many small islands in Nha Trang. On the island, it is almost crowded, basically all the people of China. Then find a lounge chair to sit, it is free. Then move freely. There are snorkeling, you can also swim in the sun on the beach. The water quality is not bad, but the shore is not a beach, it is rock or gravel.