mandatory and voluntary contributions
...butions are not on a monthly basis 如非按月供款,请说明供款方法 MANDATORY AND VOLUNTARY CONTRIBUTIONS 强制性及自愿性供款 It is understandable that voluntary contribution arrangements for MPF may be a complicated issue.
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mandatory and voluntary contributions
强制性及自愿性供款
以上为机器翻译结果，长、整句建议使用 人工翻译 。