Ning said his company has come across "investment restrictions set by other countries, each time COFCO has made a deal".
He added: "It's not easy, but it is understandable that they worry about the purpose of any deal ... We always make sure our investments bring benefits to the local economy, community and the local workforce."
Domestically, COFCO is also investing heavily in improving its operations.
"We are planning to develop more industrial complexes," he added.
In 2009, COFCO launched a 2.2 billion yuan plan to ensure better safety standards and deliver improved production and supply throughout its network.
Its "whole-chain model" involved improvements across all seven of its divisions, including agricultural goods, breeding, processing, transportation and sales.
'Gangnam style' life of young rich in Chongqing