UPDATE 4-Hong Kong protesters march again, reaching out to Chinese visitors

* HK protesters target mainland Chinese visitors for first time

* Latest protest follows ransacking of legislative building

* Protesters want to explain their opposition to extradition bill

* Security tightened around train stations, popular shopping area (Adds detail about stand-off with police, paragraphs 20-21)

By Felix Tam and Farah Master

HONG KONG, July 7 (Reuters) - Tens of thousands of protesters marched through one of Hong Kong's most popular tourist areas on Sunday, trying to gain support from mainland Chinese visitors for the city's opposition to an extradition bill which has caused political turmoil.

Protests against the now-suspended bill have drawn millions of people to the streets in the former British colony in recent weeks, posing the biggest challenge Beijing has faced to its rule in the territory since Hong Kong returned to Chinese control in 1997.

The protests have received little coverage in mainland China, however, with censors blocking news of the largest demonstrations on Chinese soil since the bloody suppression of pro-democracy protests centred on Beijing's Tiananmen Square in 1989.

The bill, which would allow people to be sent to mainland China for trial in courts controlled by the Communist Party, has triggered outrage across broad sections of Hong Kong society amid concerns it threatens the much-cherished rule of law that underpins the city's international financial status.

Hong Kong has been governed under a "one country, two systems" formula since its return to Chinese rule, allowing freedoms not enjoyed in mainland China, including the right to protest and an independent judiciary.

China and Britain have engaged in a public spat over the bill but Chinese ambassador Liu Xiaoming told BBC TV on Sunday that China was "not interested in diplomatic war with the UK" and he had full confidence in Hong Kong's ability to resolve the situation without China's intervention.

TARGETING MAINLAND CHINESE

Protesters on Sunday braved intermittent rain and marched through streets of Tsim Sha Tsui, a popular shopping destination dotted with luxury shops, to try to deliver their message directly to mainland Chinese tourists in the hope of garnering sympathy.

At times they shouted slogans in Mandarin, mainland China's official tongue, as opposed to Hong Kong's main language Cantonese.

They also handed out flyers and sent messages by social media and Apple's phone-to-phone AirDrop system written in the simplified form of Chinese characters used on the mainland.