going back to renew visa

Got an visa extension for 2 consecutive times here in china, one is tourist visa and then converted it to business visa, since i need to stay longer they ask me to go back to the Philippines and renew my visa from there,because there's a new policy that a person can only renew a visa once, would there be a problem if i go back to the Philippines? by the why the Chinese consulates are asking for the visa notice for business visa, why is that so?