In China,I am not an accountant - wǒ bú shì yī gè Kuàijì - wǒ bú shì yī míng Kuàijì - wǒ bú shì yī wèi Kuàijì - wǒ bú shì Kuàijì . People always say: wǒ bú shì Kuàijì,although other sentences are all right,but in the daily speaking, only says:wǒ bú shì Kuàijì is enough