import re

def is_valid_resource_name(name: str) -> bool:
    if not name:
        return False
    if re.search(r'[\u4e00-\u9fff]', name):
        return False
    return bool(re.fullmatch(r'[A-Za-z0-9_-]+', name))

def is_valid_customer_name(name: str) -> bool:
    return bool(name.strip())

def is_valid_region(region: str) -> bool:
    return bool(re.fullmatch(r"[a-z]{2,5}-[a-z]+-\d", region))