Surgery Before Further Chemo??

I have HER2 Positive breast cancer and my Oncologist explained the AC chemo treatment 4 x every 21 days is to shrink the tumour and then once its shrunk its saver to operate. Trying to remove a large tumour can risk loosing a cancerous cell and ending up in another part of your ..there is much less risk removing tumour when its smaller, less risk of a cancer cell escaping.
After my surgery to remove shrunken tumour and 5 lymph nodes will me weekly chemo treatment over a period of 12 months and then finally radiation