dear billzhou, i'm Mary. and you answered my question this morning. i can't contact you. so i'm here to say thanks. i know what you mean. and maybe i want to have a try in a new and different industry, i don't know. it's complicated. there seems no way to let me know whether i'm suitable to do that kind of job. if i take it, it's really a big challenge. and there are limits. i don't think i'm good at selling and i'm poor at dealing with numbers. it's a chance, but maybe not the suitable one. i don't know if you can see this. anyway thanks for your previous reply. thanks a lot.