The declining ROCE trend and lack of capital growth suggest that Henan Zhongyuan Expressway may not be a promising growth stock. The stock's performance has remained flat over the last five years, reflecting investors' lack of enthusiasm.

Challenges seem to loom for Henan Zhongyuan Expressway due to the decline in ROCE while capital employed remains steady. With potential reasons such as increased competition or reduced margins, this pattern might hinder significant stock returns despite a 17% rise in the past five years.