The Chinese human rights activist who has been camping out at Narita International Airport for the last month after Beijing refused his re-entry is asking travelers not to donate any more food because he is awash with stuff to eat.

Feng Zhenghu, an economist who in 2000 was given a three-year jail term for "illegal business activity," is subsisting on food donations.

But his "storage cabinet" under an airport bench is overflowing with enough food to last a month, Feng wrote in a recent comment on Twitter, asking his supporters to stop bringing more.

China has refused his re-entry since he traveled to Japan in April.