How do you say

We had a picnic in the park two weeks later.

..in Chinese?

两周后,我们全家一起去公园野餐。

liǎng zhōu hòu , wǒ men quán jiā yì qǐ qù gōng yuán yě cān 。

How do you say "I haven’t seen Li Xiaobin for a month. What has he been up to?" in Chinese?