Six weeks is not a big gap. But I know this is a dilema for you. I kinda know what your Onco will say. He/she will want you to start immediately. They are trying to ensure your best chances. However, you have been through so much and it would be nice to recover from Rads and feel normal again and enjoy your trip. But, on the other hand every day you are in China you may counter a new feeling of fear. It is a real tossup. For me, I would probably take them when prescribed. Six weeks is a good length of time to know what, if any side, effects you will have and deal with them. Unfortunately, I was one of the very unlucky ones whose body totally rejected all of them. I have had to live in "fear" for nearly 5 years now. Good luck..