we are faithfully looking forward to the chance to cooperate with you.
look forward to后面必须跟名词形式的短语,不能用have,可以用having.
但用having有点罗嗦,不如直接用the chance
we are faithfully looking forward to cooperating with you.更简单明了
一条英文翻译我们非常诚恳的期待能有和你们合作的机会, 主要想突出诚恳或和诚恳意思相近的词 we are faithful