Hi I'm Indian I want to visit my relatives at Hongkong but what r the criteria for the same

How long your visit will be? If it's not more than 14 days, you don't need to apply for an entry permit, but you need to make a pre-arrival registration before going there. If you wanna stay for more than 14 days, you need to apply for it. The application may take four to six weeks. During this stay, you can't change your visa to job type. You have to leave and apply for it.