visa renewal in hong kong

im a malaysian. previouly i have a 2 years multiple entry which i can enter china as many time n stay as i want. but it expired alrealdy on 2nd july. now i in malaysia reaaply for double entry to china. each entry i normally for about 20 days plus stay. my question is when my 2nd entry expired, can i go to hong kong to reapply my china visa?instend of coming back malaysia? pls advice urgently. thanks...