Chinese Visa requirements on Return Ticket

Hi!

We are 2 students holding a Dutch and an Indonesian passport currently in China on a Student Visa. We are planning to travel to the Philippines in June, however, we only have a single entry visa for China. As it is impossible to get a new visa whilst in China we must get a new one in Manila. The school year will be over by the time we go back, therefore we need a Chinese tourist visa. My question is will it be possible to get a visa for China without a retour ticket as we will be leaving the country by train somewhere in July.