It doesn't matter whether WeChat can chat with friends all over the country, because WeChat is a social software. When both parties have WeChat, both parties who want to chat with WeChat can chat nationwide as long as they log on to WeChat and become friends with each other.
As a foreign chat software, WeChat has a small market share, is not popular, is highly replaceable, and has no great penetration demand. The empowerment of WeChat Ecology as a marketing tool has great commercial value and can also directly hit the pain points of foreigners, which is also the main direction of WeChat facing foreign markets.