Ask HN: Getting prototypes from China [Indian firm]

Folks

A local startup is planning to get funding from state government on there idea of a portable toilet for villages.

These people want to get a operational prototypes (number:20) done for there project to show the value prior to reaching out to goverment. Getting this done in India locally is posing as a costing nightmare. Could you suggest good Chinese manufacturer, who these people can partner with? or lease what is the correct process for getting started with manufacturing from China.