New figures from a Chinese business think tank, China Index Academy, show that the average housing prices in 100 Chinese cities grew more than 10 percent year on year last month.
Compared to April, May has witnessed a 1.7 percent increase.
In the meantime, it's reported the top ten cities with the highest price increase in May are all second-tier cities.
The academy's forecasts suggest the growth of property prices of second-tier cities is expected to be anywhere between 30 and 40 percent this year.
Analysts say the heat in second-tier cities is making it difficult to reduce the number of China's unsold homes.
For more on this, CRI's Tu Yun talked to CAO CAN and Einar Tangen, both CRI's financial commentators.