Serious text display problems？？？

[pengsaizhen]

Chat system does not display a full-width characters ( including Chinese )，who can i help me to solve this problem？？ty very much！：mellow：：mellow：：mellow：

[MentaL]

[chinaspm]

煞笔

[pengsaizhen]

2楼 我草你妹啊！

[chinaspm]

2楼 我草你妹啊！

丢人现眼的货 日你妈

[cHiPiDle]

Chat system does not display a full-width characters ( including Chinese )，who can i help me to solve this problem？？ty very much！：mellow：：mellow：：mellow：

Try to change default font (Arial) to another Chinese font that Chat window could support.