Does a landing visa (stamp) from Thailand work for me to apply for Z visa?

Hi, I an American citizen applying for a Z visa in China. My employer has already started the process of obtaining the Foreign Experts Certificate for me, as well as the Invitation Letter. When filling out Form B of the Visa Application, they ask if I have a valid visa in the country I am apply from. Does the stamp that I receive upon landing in Thailand count as a valid visa for me to apply for the Z visa? If not, what do I need to get?

Thank you!