Passports for Malaysian children whose parents are abroad used to be handled by them.

You can't. Shishi city Public Security Bureau's information about handling passports. If the parents are in a foreign country in Malaysia and their children are under the age of 16, their first application, renewal and replacement cannot be handled on their behalf, and they need to be accompanied by themselves and their guardians to the reception hall. Passport is a document issued by the competent diplomatic authorities to prove the citizenship of going abroad.