Could it be too much water? Generally, the moisture content of bread accounts for 50~65% of the total flour, and it will not be too wet (except that the moisture content of bread in Tang Zhong can account for 65~75% of the total flour), so that's all. If you knead the dough by hand, if it is too sticky during kneading, you can pour some water first, and then add the remaining water several times after the dough is gradually kneaded into gluten.

If it is too wet for plastic surgery, you can spray a small amount of high-gluten powder on the surface to help plastic surgery, but you can't add too much, which will affect the taste. You can also apply a thin layer of vegetable oil to your hands and chopping boards to help with plastic surgery.