Veteran SCMP diplomacy correspondent Shi Jiangtao reports on Beijing's response to US president Joe Biden's trip to South Korea and Japan, with angry phone calls to Tokyo, warnings to Jake Sullivan and corresponding incursions of Chinese bombers and naval vessels amid increasing concerns among Chinese analysts of a "NATO for Asia" being assembled. Trade expert Dr Deborah Elms unpacks the reality of Biden's IPEF trade agreement and how it might (or might not) work within the existing RCEP and…