From a new paper by Mingrui Wang and Richard Lynn:
Data are reported for intelligence of children in China assessed by the Combined Raven’s Test in 1988, 1996 and 2006. The IQ of the samples increased by 15.0 IQ points over 18-year period. The British IQ of China in 1988 and 2006 is estimated as 94.8 and 109.8, respectively.
It seems that rural Chinese teens in 2006 were already as bright as their urban counterparts in 1988.
This is comparable to increases in South Korea between 1970 and 1990.
Note that Raven’s tests see some of the biggest increases due to the Flynn Effect, while increases in verbal, arithmetic, and Backward Digit Span tend to be some of the lowest.