Registration: the official HSK website (chinesetest.cn) or authorised test centres worldwide; find centres on the site.
Fees (approx): HSK1 RMB 150, HSK2 250, HSK3 350, HSK4 450, HSK5 550, HSK6 650; varies by region.
Steps: create an account, pick centre/date, fill info, upload a photo, pay (online banking/Alipay/card). Book 2-4 weeks ahead - popular centres fill fast.
Rescheduling/refunds: most centres allow free rescheduling 10+ days before the test; within 10 days there is a fee. Refund rules differ - read them first.
Admission ticket: downloadable about a week before the test; print with photo. Bring it and your passport on the day.
Results: scores in about 2 weeks; paper certificates arrive in 1-2 months; e-score reports work for schools and employers.