✔ 最佳答案
The use of English cannot be a striaght translation of the chinese.!!!!!!!!
I regret to inform you that the forecast arranged in previous meetings will be postponed due mainly to an unexpected problem in the product. Further arrangements will be made upon re-examination of the product.
Thank you very much for your kind consideration.
NOTE: writing to an english client, or usage of english in business writing usually is humble and polite.. please note!