Sergey Lavrov discusses Ukraine in Beijing Russian Foreign Minister Sergey Lavrov visits Beijing for talks with President Xi Jinping and Foreign Minister Wang Yi . They are expected to focus on the crisis in Ukraine, following the annexation of Crimea. The visit comes ahead of four-way talks involving the European Union, the US, Ukraine and Russia scheduled for Thursday. China has adopted a cautious approach towards the crisis and abstained in a UN Security Council vote on the issue. Nato strengthens eastern Europe defences Nato's Supreme Allied Commander for Europe, General Philip Breedlove, draws up a package to strengthen Nato's eastern European allies. Nato military chiefs are concerned that Russian forces on the Ukrainian border could pose a threat to eastern and southern Ukraine. The package includes reinforcing land, air and sea power in the region. However, Russia says it has no intention of invading Ukraine. Industrialists give views on political reform Secretary for Constitutional and Mainland Affairs Raymond Tam Chi-yuen consults young industrialists on constitutional reform. Separately, the Chinese Manufacturers' Association submits its reform proposals to the government. These moves follow the weekend visit by Hong Kong lawmakers to Shanghai for talks with senior mainland officials on how to proceed with the election of the chief executive in 2017. DAB celebrates its 22nd birthday There will be a very high-profile line-up of guests for the 22nd anniversary fundraising dinner for the pro-Beijing Democratic Alliance for the Betterment and Progress of Hong Kong. They include Chief Executive Leung Chun-ying, Chief Secretary Carrie Lam Cheng Yuet-ngor, Financial Secretary John Tsang Chun-wah and liaison office director Zhang Xiaoming . Boston remembers bombing anniversary Top dignitaries will mark the first anniversary of the Boston Marathon bombing that killed three people and wounded 264. A flag-raising ceremony will be held at the marathon finish line where the bombing took place. Massachusetts Governor Deval Patrick, Boston Mayor Marty Walsh and other speakers will honour the victims. The trial of suspect Dzhokhar Tsarnaev will start in November. If convicted, he faces the death penalty. Sex on view at Sotheby's showroom It's not quite what you think. Sotheby's is presenting a collection of Chinese artworks with an erotic theme at its Hong Kong showroom in Pacific Place. The exhibit, from the Ferdinand M. Bertholet Collection, showcases items dating from the Han to the Qing dynasties. Sotheby's says the collection offers "an unparalled view into an exceptional story of sex in the ancient Middle Kingdom".