[经] customs formalities and requirements

hǎi guān shǒu xù hé guī dìng ㄏㄞˇ ㄍㄨㄢ ㄕㄡˇ ㄒㄩˋ ㄏㄜˊ ㄍㄨㄟ ㄉㄧㄥˋ