An American Helped Build a Business Inside China. Clients Want Him to Leave.

It took Jacob Rothman two decades to build a Chinese manufacturing business with his friends and family. Now the 49-year-old American executive says customers want him to make some of his grilling tools and kitchen products elsewhere. He knows it isn't going to be easy. "There's not a customer that we have that isn't pressuring us, suggesting, hoping that we will build factories outside of China," says the co-chief executive of Velong Enterprises Co., which has six factories in mainland China and serves big retailers and consumer brands such as Walmart Inc. and grill maker Weber Inc. Yet "there's nothing…