Is the concept of cross-border communication the same as that of Pinduoduo?

It's different.

Cross-border communication is a global industrial interoperability with a relatively large scope. Pinduoduo is a marketing method of buying together, which is suitable for China and has a small scope.

Cross-border communication refers to an e-commerce platform established on September 7, 2003+2065438, which is built and operated by Shanghai Oriental Payment Co., Ltd.