The percentage of origin standard in column 8 of form e can

We are a trading company in Tianjin. We need to apply for form e certificate of origin for two machines exported to Vietnam. As the customer knows that the parts of the two machines are not entirely from China, he requires us to give a percentage(95%) of the origin standard in column 8 when applying for the certificate of origin of form e, and we will not accept & quot; Wo & quot; The agent of form e said: now the standard of origin in the eighth column of form e can only show & quot; Wo & quot; and can't display the percentage. Isn't there a contradiction between the two? Now I want to ask you: can the standard of origin in column 8 of form e be marked with percentage?