China should build less frigates and more destroyers if it wants to expand its blue water navy. Although the new frigates can travel to Somalia, it is still just a patrol, not real wartime assignments. Plus, it can only carry a few missiles, which is not that effective when really putting it into use. China would need at least 10,000 ton class destroyers to make its navy formidable.
Tell the truth, I personally favour cruisers like Varyag and Peter the Great, but I think it should be Aegis style when made by the Chinese. Still vertical launch but sealed in universal launchers, just the tonnage matching Varyag class cruisers. Any countries would be shaken with that monster in their waterways.