By Kevin Liffey (Reuters) -Russian President Vladimir Putin said on Friday he was expecting Chinese President Xi Jinping to make a state visit early next year in what would be a public show of solidarity from Beijing as Russia’s invasion of Ukraine falters. But an official Chinese readout of a video summit between the two leaders highlighted differences in approach to their developing alliance, making no mention of a visit and stressing that Beijing, which has declined to back or condemn the invasion, would maintain its “objective and fair” stance. Since sending troops into Ukraine in February…