# 数据上链
- **[区块链实例交易连接失败或连接超时](https://support.huaweicloud.com/bcs_faq/bcs_faq_0501.html)**   
- **[连接区块链的时候不稳定，经常出现网络断开、被拒绝连接](https://support.huaweicloud.com/bcs_faq/bcs_faq_1216.html)**   
- **[数据上链的方式](https://support.huaweicloud.com/bcs_faq/bcs_faq_0030_01.html)**   
- **[联盟成员之间的数据如何同步？](https://support.huaweicloud.com/bcs_faq/bcs_faq_0030_02.html)**