Flying from Berlin to Hong Kong and leaving from Guangzhou to Ho Chi Minh City 72 hours later

If you stay within 72 hours, you may apply for the 72 hours free transit at Guangzhou airport when you fly from HK. The hours is counted from the 00:00 next day. If you stay more than 72 hours, a transit type one is needed and you should apply for it in advance before you fly from HK to Guangzhou.