Based on news reports in other countries it's a pretty consistent stance for Chinese diplomats to make the claim that if Huawei is allowed to compete in a free market manner it will be beneficial to trade relationship or if Huawei is banned for security reason it will damage trade relationship with China. The article did provide a background for such security concern from Danish defense ministry.
It's still entirely in the realm of possibility that the Chinese diplomat in question asked for unfair non-market advantage, but I find it quite unnecessary because Huawei's technology is already competitive on its own, why spend political capital for such minute economic gains? A more probable story, as has already happened in many other countries, is that local ISP chooses Huawei based on price and competitiveness and is blocked by government on security grounds, then Chinese diplomats step in to remove that block based on other stick and carrots.