Production systems, such as Lean Production System (LPS), have been developed to improve organisational performance. In their application to small and medium enterprises (SMEs), resource constraints mean that business assistance from external agencies, such as management consultants, is often required. This study aims to explore the practical issues associated with consultancy-involved LPS implementation in Chinese SMEs and the possible approaches to deal with them. A multiple case study is conducted focusing on four real-life, consultancy-involved, lean projects in Chinese SMEs. Four key problems that arise from consultancy-involved change of production systems are identified and four relevant approaches to handle these four problems are also addressed. The case study implies that to better embed new production systems, such as LPS into SMEs, both consultants and SME clients need to adopt a more proactive approach when engaging with each other.