If China "creates" its own skype and flogs it in the US, should the US block it? I know this would a very protectionist move but what is the way forward for fo

If China "creates" its own skype and flogs it in the US, should the US block it? I know this would a very protectionist move but what is the way forward for foreign companies to be competitive in China when China's blocking of foreign services is accompanied by worries of "disrupting harmonious societies"?