It doesn't matter whether it is published or not. If it is not published in internationally renowned academic journals, but only published in China, or even China, it is meaningless. China's academic, we know, others also know.

There is no harm in attaching weight to him/her. Save some postage if there is no weight.

It doesn't matter without paper.

Tianzi86 is right: master's thesis is not required to be published abroad. ......。 You'd better write a letter of recommendation from your domestic tutor first.