肯尼亚客户奇怪的付款方式之说

前一阵子谈了一个肯尼亚客户，产品是A4纸，我们的付款方式是30% T/T， the balance L/C at sight. 但是客户回复却说，他们那里不能T/T，必须缺信用证，客户的回复时这样的,我有点看不懂是什么意思。希望高手指点： 件内文hi and thanks for you're time i he got you re massage and i understand that,to do advance money we he to got clarification to commercial attachments from china high commission in Kenya if you agree that then well do that please let me know if you are happy that or not this for security reason hope you well understand that??thanks best regards m ahmed 请问划线的那句话，说的是什么？小女初学外贸，不知所为何物。望高手指点。