Typical spring flowering shrubs are Forsythia and Spiraea. When and how to cut them. Igor Bilevich advises to see:
Pruning spring flowering shrubs:    • Обрезка кустарников весеннецветущих /...  
More about pruning spring flowering (tamarix):    • Про обрезку весеннецветущих кустарников  
Japanese Spiraea 1:    • Спирея японская  
Spirea Japanese 2:    • СПИРЕЯ ЯПОНСКАЯ / Посадка и уход / Иг...