sentences:  Karl Gützlaff (also known by his Chinese name, 郭實臘 or Guō Shílà in Pinyin) is generally regarded as the first Lutheran missionary to China.Originally accredited to the Netherlands Missionary Society, Gützlaff first arrived in East Asia in 1823.As China adopted a strict closed-door policy in that period, he was unable to set foot on China until 1831.