Vehicles make their way back into South Korea.<br /> <br />On Wednesday, four more South Korean workers returned from the joint Kaesong industrial park, which is run by the North.<br /> <br />Officials there closed the border weeks ago, denying entry to South Korean staff and forcing a standoff between the two Koreas.<br /> <br />The workers returned as news came that 10 business owners had been denied the right to visit Kaesong and deliver much needed food to staff members.<br /> <br />Some 205 South Korean workers are refusing to leave the park in hopes of keeping their factories running, despite deteriorating conditions.<br /> <br />(SOUNDBITE) (Korean) 50-YEAR-OLD SOUTH KOREAN WORKER OH HEUNG-KEE SAYING:<br /> <br />"We hope the problem can be solved smoothly. All workers in Kaesong are suffering now. I hope things will go well, so that they (the remaining workers) do not have to endure hardships anymore."<br /> <br />In response, South Korea's unification ministry called the decision "regrettable."<br /> <br />China, Japan and