point of entry: Stamps issued within Hong Kong Island (Hong Kong-Macau Ferry Terminal Control Point, by either sea or air) were in purple ink. Stamps issued within Islands District (Hong Kong International Airport Control Point by air) were in black ink. Stamps issued within Kowloon (Hung Hom Control Point by trains, Ocean Terminal Control Point and China Ferry Terminal Control Point by sea) were in green ink. Stamps issued within New Territories (Sha Tau Kok Control Point, Man Kam To Control Point, Lo Wu Control Point, Lok Ma Chau Control Point, Lok Ma Chau Spur Line Control Point and Shenzhen Bay Control Point by land, Tuen Mun Ferry Terminal Control Point by sea) were in red ink. Currently, Hong Kong's e-Channels are situated at all border crossing points. A person who holds a Hong Kong Identity Card (HKID) inserts the card into a slot to enter the first eGate and then has their thumbprint scanned to pass through the second eGate. The Frequent Visitor program was further expanded to nationals of the following countries. Such arrangements are reciprocal and eligible Hong Kong Special Administrative Region passport holders may also enrol for the respective automated border clearance schemes under these countries: Republic of Korea enrolled under Smart Entry Service (SES) scheme (Since 16 December 2013) Singapore (Since 22 September 2014) Germany (Since 1 November 2014) Australia (Since 20 June 2016) Thailand (Since 15 September 2018) India India uses the differentiation in passport stamp colours – entry in blue, exit in red – to quickly trace a passenger's movements. The stamp can be rectangular, circular or oval. Indonesia Entry stamp is only issued to the holder of Indonesian travel documents, while other nationalities will instead receive an entry sticker affixed to the passport showing the duration limit of their stay. Exit stamp is still normally issued to all travellers departing from Indonesia. Iran Iran applies an oval shaped stamp with blue ink for entry and a square shaped stamp with red ink for exit. All dates written on the stamps are in the Solar Hijri calendar, and it is written in Persian. Iraq Iraq passport stamps differ depending upon whether the checkpoint is located in Kurdistan Region, or the rest of Iraq. Israel Traveling with passports containing Israeli entry/exit stamps to certain Arab nations may lead to a denial of entry, because of the Arab League boycott of Israel. Since January 2013,