Thank you very much for your advice, will water more to help the roots grow.
It's interesting that bart2018 mentioned "The rose needs to work on it's roots right now, and can't support the new growth" Actually, I planted 4 roses that day, two of them have no new growth on top, and none of any green leaves at the top are wilting.
I still have 4 more bare root roses (hybrid tea) to plant, and they have been sitting in my back yard for 4 weeks, they are from Aldi and Home Depot (former are in the bags, latter are in plastic containers, both are filled with soil). I water and expose them under the sun every day, the soil inside are always moist. Now they have grown more leaves and taller, almost like small trees, one of them even has 3 rose buds.
Could you advise me when I plant them, I should remove all the soil around the roots, or I can plant them with the soil. Thank you.