[ADD] accounting: add Hong Kong localisations

closes #4309

Related: odoo/odoo#120050
Signed-off-by: Platteau Xavier (xpl) <xpl@odoo.com>

Author: tong-odoo

content/applications/finance/fiscal_localizations.rst

@@ -83,7 +83,7 @@ available on Odoo.
 - Greece - Accounting
 - Guatemala - Accounting
 - Honduras - Accounting
-- Hong Kong - Accounting
+- :doc:`Hong Kong - Accounting <fiscal_localizations/hong_kong>`
 - Hungarian - Accounting
 - :doc:`Indian - Accounting <fiscal_localizations/india>`
 - :doc:`Indonesian - Accounting <fiscal_localizations/indonesia>`
@@ -139,6 +139,7 @@ available on Odoo.
    fiscal_localizations/egypt
    fiscal_localizations/france
    fiscal_localizations/germany
+   fiscal_localizations/hong_kong
    fiscal_localizations/india
    fiscal_localizations/indonesia
    fiscal_localizations/italy

content/applications/finance/fiscal_localizations/hong_kong.rst

@@ -0,0 +1,70 @@
+=========
+Hong Kong
+=========
+
+Configuration
+=============
+
+:ref:`Install <general/install>` the :guilabel:`Hong Kong - Accounting` module to get the features
+of the HK localization.
+
+.. image:: hong_kong/hk-module.png
+   :align: center
+   :alt: "Hong Kong - Accounting" localization module marked as "installed"
+
+Add FPS QR codes to invoices
+============================
+
+:abbr:`FPS (Faster Payment System)` is a payment service platform that allows customers to make
+instant domestic payments to individuals and merchants in Hong Kong dollars or Renminbi via online
+and mobile banking.
+
+Activate QR codes
+-----------------
+
+Go to :menuselection:`Accounting --> Configuration --> Settings`. Under the :guilabel:`Customer
+Payments` section, activate the :guilabel:`QR Codes` feature.
+
+.. image:: hong_kong/hk-qr-code-setting.png
+   :align: center
+   :alt: "QR Codes" feature activated
+
+FPS bank account configuration
+------------------------------
+
+Go to :menuselection:`Contacts --> Configuration --> Bank Accounts` and select the bank account for
+which you want to activate FPS. Set the :guilabel:`FPS Type` and fill in the :guilabel:`FPS ID/Phone
+Number/Email Address` field depending on the type you chose.
+
+.. note::
+   The account holder's country must be set to Hong Kong on its contact form.
+
+.. image:: hong_kong/hk-fps-bank-setting.png
+   :align: center
+   :alt: FPS bank account configuration
+
+.. seealso::
+   :doc:`../accounting/bank/setup/bank_accounts`
+
+Bank journal configuration
+--------------------------
+
+Go to :menuselection:`Accounting --> Configuration --> Journals`, open the bank journal, then fill
+out the :guilabel:`Account Number` and :guilabel:`Bank` under the :guilabel:`Journal Entries` tab.
+
+.. image:: hong_kong/hk-bank-account-journal-setting.png
+   :align: center
+   :alt: Bank Account's journal configuration
+
+Issue invoices with FPS QR codes
+--------------------------------
+
+When creating a new invoice, open the :guilabel:`Other Info` tab and set the :guilabel:`Payment
+QR-code` option to *EMV Merchant-Presented QR-code*.
+
+.. image:: hong_kong/hk-qr-code-invoice-setting.png
+   :align: center
+   :alt: Select EMV Merchant-Presented QR-code option
+
+Ensure that the :guilabel:`Recipient Bank` is the one you configured, as Odoo uses this field to
+generate the FPS QR code.